An armed group claimed in a video Thursday to have obtained a large amount of explosives missing from a munitions depot facility in Iraq (search) and threatened to use them against foreign troops.

A group calling itself Al-Islam's Army Brigades (search), Al-Karar Brigade, said it had coordinated with officers and soldiers of "the American intelligence" to obtain a "huge amount of the explosives that were in the al-Qaqaa (search) facility."

The claim couldn't be independently verified. The speaker was surrounded by masked, armed men standing in front of a black banner with the group's name on it in the tape obtained by Associated Press Television News.

"We promise God and the Iraqi people that we will use it against the occupation forces and those who cooperate with them in the event of these forces threatening any Iraqi city," the man added.

Nearly 400 tons of conventional explosives have disappeared from the al-Qaqaa facility south of Baghdad, according to the International Atomic Energy Agency.

The U.N. agency's chief Mohamed ElBaradei,reported the disappearance to the U.N. Security Council on Monday, two weeks after Iraqi officials told the nuclear agency that 377 tons of explosives had vanished as a result of "theft and looting ... due to lack of security."

The disappearance of the explosives has become a huge campaign issue in the U.S. presidential election.