Poland's prime minister on Sunday lashed out at Germany's decision not to supply Leopard tanks to Ukraine, branding the country's stance "unacceptable".
Berlin has been hesitant to send the heavy-duty tanks or allow other nations to transfer them to Kyiv.
"Germany's attitude is unacceptable. It has been almost a year since the war began. Innocent people are dying every day," Prime Minister Mateusz Morawiecki told the PAP agency.
"Russian bombs are wreaking havoc in Ukrainian cities. Civilian targets are being attacked, women and children are being murdered".
On Friday, around 50 countries agreed to provide Kyiv with billions of dollars' worth of military hardware, including armoured vehicles and munitions needed to push back Russian forces.
But German Defence Minister Boris Pistorius said despite heightened expectations, "we still cannot say when a decision will be taken, and what the decision will be, when it comes to the Leopard tank."
Germany is the producer of Leopard tanks and Poland's prime minister also said he was waiting for "a clear statement" from Berlin whether countries that have the Leopards can transfer them to Ukraine.
Poland has announced it is ready to deliver 14 Leopard tanks to Kyiv, and says it is discussing the matter with around 15 countries.
If Berlin refuses to supply the tanks to Ukraine, "we will set up a 'small coalition' of countries ready to donate some of their modern equipment, their modern tanks," Morawiecki said.