Almost 300 suspected insurgents were detained overnight in the largest joint U.S.-Iraqi military offensive in Baghdad, the Associated Press quoted military as saying on Monday. The ongoing offensive, dubbed Operation "Squeeze Play," is centering on western Baghdad's Abu Ghraib district and targeting militants suspected of attacking the U.S. detention facility there and the road linking downtown to the international airport, the military said in a statement. "This is the largest combined operation with Iraqi security forces to date," said U.S. military spokesman Lt. Col. Clifford Kent. "The Iraqi Security Forces have the lead in this operation while we perform shaping and supporting roles." Seven Iraqi battalions backed by U.S. forces launched the offensive late Sunday.