Polish Prime Minister Donald Tusk said Saturday "we have an informal confirmation" that a Polish hostage in Pakistan has been killed by his captors. "From Pakistan we have an informal confirmation that this tragedy in fact took place," Tusk told Poland's TVN24 news channel, speaking in Munich, Germany. "We have used all political, operational, logistical means to prevent this tragedy," Tusk said. Hostage Piotr Stanczak was seized on September 28 by armed men who killed his two drivers and bodyguard in restive northwest Pakistan, where he was working for a Polish energy company. The Taliban said Saturday it had killed a Polish engineer kidnapped last year in Pakistan, but the Polish embassy in Islamabad was not able to confirm the claim. "We have beheaded the Polish engineer after the government failed to meet our demands and we will not hand over his body," a Taliban spokesman said by telephone.