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In this Jan. 6, 2010 file photo, police officers and investigators stand at the site of a suicide attack on a police station on the outskirts of Makhachkala, the provincial capital of Russia's Dagestan region. Clashes between authorities and Islamic militants have become part of everyday life in Dagestan, the largest and most violent of Russia's mostly Muslim provinces in the North Caucasus, a breeding ground for terror spreading all the way to Moscow. АР MAKHACHKALA,Russia(AP) — A police officer stopped at a traffic light in Dagestan's capital is gunned down from an adjacent car. A driver blows himself up at a checkpoint. The mayor has survived 15 assassination attempts.

Attacks on authorities take place almost daily in Dagestan, the largest and most violent ofRussia'smostly Muslim provinces in the North Caucasus, a breeding ground for terror spreading all the way toMoscow.

The separatist movement that began more than 15 years ago as a battle forChechnya'sindependence has mutated into a violent quest for an Islamic state in a region stretching some 650 kilometers (400 miles) east to west from the oil-rich Caspian Sea to Sochi, venue of the 2014 Winter Olympics.

That is hardly likely to happen, but it ensures that the Caucasus will continue to be post-communistRussia'sfestering wound.

The pattern is familiar: Poverty, a 50-percent unemployment rate and a government perceived as corrupt and abusive drive the discontented into the arms of Islamic militants, police crack down hard, innocents suffer and the separatists gain more recruits.

"There is a colossal gap between authorities and society in Dagestan," Alexei Malashenko, an expert on the Caucasus with the Carnegie Endowment'sMoscowoffice, said in an interview. "People feel increasingly frustrated, and the Islamists are becoming increasingly popular."

The North Caucasus includes six semiautonomous republics, and the Islamic insurgency seems to have a way of jumping from one republic to another.

No sooner didMoscow'slong war against Chechen rebels achieve a fragile peace than Ingushetia became a rebel staging ground. Government subsidies and better administration relieved the pressure in Ingushetia, so now the focus is on Dagestan.

The Kremlin appears to have no comprehensive strategy for countering the rising insurgency. Its response has been limited largely to reshuffling officials in charge of the region while failing to deliver promised reforms.

Now, after years of assurances that Caucasus militants were being brought under control,Russianofficials are sounding an alarm. In January, after a suicide bomber killed 36 people atMoscow'sbiggest airport, President Dmitry Medvevev called terrorism the main threat toRussiaand acknowledged that attacks had increased in 2010.

After the bombing,Russiaannounced grand plans to build job-creating ski resorts in the region's breathtaking mountains. A month later militants responded by killing threeRussianski tourists and blowing up a major ski lift. Police said they also defused a massive car bomb outside a resort hotel.

These attacks happened in another republic, tiny Kabardino-Balkariya, where attacks on authorities multiplied more than sevenfold to roughly four a week in 2010 and killed 42 police officers, by official count.

Overall, about 300 law enforcement agents were killed in the North Caucasus last year, and about 650 were wounded, according to official figures.

Caucasus insurgents claimed responsibility for the airport bombing and last year's double suicide bombing on theMoscowsubway that killed 40. Doku Umarov, the Chechen who leads the rebellion and calls himself the Emir of the Caucasus, vowed that 2011 would beRussia's"year of blood and tears."

Russianauthorities have said repeatedly that the rebels have close links with al-Qaida and get funds from sympathizers in the Arabian peninsula.

The insurgents do not appear to have anywhere near the strength to force secession fromRussia, but withMoscowunable to suppress them, the region could face a long and violent stalemate. The militants operate in small, autonomous cells that are hard for authorities to track down, says Gennady Gudkov, a veteran counterintelligence officer and now a member of theRussianparliament.

Just over a decade ago, Dagestanis fought alongsideRussianfederal troops to fend off rebels who invaded from neighboringChechnya.Chechnyahas since grown more stable under the tough rule of its Kremlin-backed strongman, while Dagestan has become the main base for militants.

"In the Caucasus,Russiahas effectively turned into a failed state," said political analyst Yulia Latynina. "In 1999 Islamists in Dagestan were marginals who suffered a defeat, but now they have become a powerful force."

Ruslan Gereyev, a sociologist monitoring the youth in Dagestan, said Islamic rebels are gaining popularity among the region's teenagers, who "see them as their idols."

ARussianSWAT team officer, who asked to be identified only as Nikolai because of the sensitivity of his job, said recruits are trained for several months, then go into action in autonomous groups of 10. He estimated the number of militants in Dagestan at about 500, many in their teens.

The recruiters seem to have large sums to attract jobless, impoverished recruits. Nikolai said a group of 12 militants recently wiped out by his unit had more than $1 million in cash. If they need funds quickly, the insurgents extort money from local businesses, he said.

But Isalmagomed Nabiyev, a human rights activist here, says Dagestanis probably fear the Islamists less than they fear the police, who "have all the power, but they act like bandits."

AlthoughChechnyawas the root of the insurgency, it is now probably the toughest place for Islamic militants to operate. Kremlin-backed President Ramzan Kadyrov, himself a former rebel, has co-opted many ex-militants into his paramilitary forces, which have been accused by rights activists of killing and torturing people with suspected links to militants.

"Kadyrov has been extremely cruel and quite successful in fighting the Islamists," Latynina said.

At the same time, Kadyrov also has sought to undercut the radicals by enforcing Islamic customs and building a colossal mosque, touted as Europe's largest. His construction projects created new jobs and transformed the capital, Grozny, from a war ruin into a modern city.

Unlike inChechnya, where Kadyrov's word is law,Moscow'sforces in Dagestan must navigate a web of shifting alliances in a population of 2.7 million consisting of dozens of ethnic groups.

Said Amirov, mayor of Dagestan's capital, Makhachkala, epitomizes the dangers a senior official position entails. He has been in a wheelchair since an assassination attempt in 1993, and has a private army of several hundred security guards. In 1998, a car bomb aimed at him brought down scores of houses and killed 19 people, but he escaped unhurt.

Gunbattles between security forces and suspected militants can last for hours in this city, a chaotic mix of drab Soviet-era apartment buildings and small private houses stretching between he mountains and the Caspian seaside. Nikolai, the SWAT team officer, said only in Dagestan has he seen a police precinct chief being driven in an armored Mercedes limousine with bodyguards. "And the militants aren't the only ones whom they want protection against."

Dagestan also has criminals who kill police for their weapons and officials for their expensive cars, and who kidnap people for ransom, he said. Such groups often are used as hired guns by rival clans.

Attacks on bars and stores selling alcohol are usually blamed on Islamic militants, but could also be the work of racketeers seeking protection money.

A waitress at the Luvr bar shudders at the memory of a January attack by three masked gunmen, which left two patrons badly burned. "They fired their guns in the air, splashed gasoline on the curtains and fled," said the waitress, who identified herself only by her first name, Patimat, for fear of reprisals.

Dagestan's regional leadership is considering an amnesty for rebels who lay down their arms — a strategy that helped to pacifyChechnyaand Ingushetia, the previous epicenter of Caucasus violence.

Ingushetia used to be under the control of a former KGB general who encouraged brutal security sweeps that fomented public anger. The current ruler, Yunus-Bek Yevkurov, has sought to end abuses against civilians and amnestied many former rebels, and attacks have dropped considerably.

But rebels still have camps in forested mountains, and the suspected airport bomber came from Ingushetia.

The Czars took half of the 19th century to conquer the Caucasus, and analysts don't think the current insurgency can shakeRussia'sgrip. In the turbulent years after theSovietcollapse, weakened Kremlin controls and empty coffers encouraged separatist sentiments, but today the militants are too few to force a separation, and the political and business elites wouldn't support it.

"The Caucasus will not break away fromRussiabecause local elites get money from the federal budget," said Malashenko of the Carnegie Endowment.

The Caucasus factor will play an important role inRussia'spolitics as it approaches elections in March 2012 in which Prime Minister VladimirPutinis widely expected to seek his return to the presidency. The second war inChechnyabegan underPutin'sleadership a few months before the March 2000 election, and his tough posture helped him win the presidency.