Warsaw  - Poland's Ministry of Foreign Affairs offered a reward of 1 million zloty (291,248 dollars) on Tuesday for information leading to the arrest of the Taliban responsible for killing a kidnapped Polish engineer in Pakistan.

Pakistani militants released on Sunday video footage of the Pole's beheading. They had offered to exchange him for 61 of their colleagues held by Pakistan.

Poland's foreign minister said on Tuesday that Pakistan confirmed the engineer is dead, but that neither side knows where the body was taken.

Stanczak was seized by militants who ambushed his vehicle in Pakistan's Attock district, 85 kilometres from the capital Islamabad, last September 28.

Prime Minister Donald Tusk on Tuesday hit back at critics who claim the government didn't do all it could to rescue the captive.

"(Their efforts) were made professionally and with full determination," Tusk told reporters, adding that it wasn't possible to send a military mission to the territory.

"Some think that life is a sensational movie," Tusk said. "But we were ready to use such methods only when the chances of freeing were realistic, and the chances of our soldiers living through it were more than symbolic." dpa