A Shiite militant group in Iraq has posted an Internet video showing an American it says it abducted and who appears to be a contractor reported missing by the U.S. military.

The U.S. Department of Defense said Friday that American contractor Issa T. Salomi, 60, went missing Jan. 23 in Baghdad and that search and recovery efforts were under way, but it released no other details. The U.S. military in Baghdad on Saturday confirmed Salomi is missing but would not provide additional information.

In the video, the man - who did not identify himself - says his abductors from the League of the Righteous are demanding the release of militants and the prosecution of Blackwater security contractors accused of killing 17 Iraqis in 2007 in Baghdad.

"The second demand is to bring the proper justice and the proper punishment to those members of Blackwater company that have committed unjustifiable crimes against innocent Iraqi civilians," the man said. "And to bring justice by proper compensation to the families that have been involved in great suffering because of this incident."

Blackwater security contractors were protecting U.S. diplomats when the guards opened fire in Nisoor Square, a crowded Baghdad intersection, on Sept. 16, 2007. Seventeen people were killed, including women and children, in a shooting that inflamed anti-American sentiment in Iraq.