Iraqi police commandos backed by U.S. troops have seized a suspected insurgent training camp northwest of Baghdad after an intense battle.

Iraqi officials said Wednesday, the fighting raged for about 12 hours on Tuesday near Lake Tharthar, not far from Tikrit They said as many as 80 insurgents and seven police commandos were killed.

U.S. military officials confirmed that U.S. forces provided air and ground support, but they could not confirm the number of insurgents killed. They added that there were no American casualties.

A group calling itself the Islamic Army of Tikrit posted leaflets Wednesday, in that city, saying that only 11 of its fighters had been killed.

Some information for this report provided by AP, AFP and Reuters.