Poland promised to issue international arrest warrants for Taliban militants after the apparent beheading of a Polish engineer in Pakistan, and officials charged that elements within the Pakistani government shared blame for the killing. Pakistan's top diplomat in Poland firmly rejected the accusation that some members of the Islamabad government are sympathetic to Islamic extremists, saying his country is ensnarled in a bitter fight with terrorist groups. Without a body, Polish authorities were not able to officially confirm the death of Piotr Stanczak, but they said a seven-minute video purporting to show the 42-year-old's slaying appeared authentic. Copies of the video were delivered to journalists in Pakistan on Sunday. Foreign Minister Radek Sikorski condemned the apparent killing as a "bestial execution" and said the government would issue arrest warrants for the culprits.