A statement said three attackers broke into a communications building in Sharan, the provincial capital, about 100 miles (160 kilometers) south of Kabul.
In the ensuing firefight two of the attackers set off their suicide bomb vests, it said. In addition to the three attackers, three policemen and four employees of the Telecommunications Ministry were killed in the attack, the statement said. Two officers and a civilian were injured.
The Taliban claimed responsibility and said it involved multiple targets. In a statement emailed to journalists, Taliban spokesman Zabiullah Mujahid said the governor’s office, the provincial reconstruction team and the intelligence headquarters were all hit.