BAGHDAD (AP) - The Iraqi military has turned down requests from American forces to move unescorted through Baghdad and conduct a raid since the transition of responsibility for urban security at the end of last month, an Iraqi military commander said Monday.

U.S. combat troops withdrew from urban areas on June 30 under a security agreement with Iraq that requires all U.S. troops to be out of the country by the end of 2011.

Col. Ali Fadhil, a brigade commander in Baghdad, said the transfer had occurred with minor friction in the capital where violence has dropped dramatically since the sectarian bloodletting and insurgent attacks that swept much of the country in past years.

Fadhil told The Associated Press about two occasions in which Iraqi troops turned down U.S. requests to move around the capital until they had Iraqi escorts, and one instance to conduct a raid, which the Iraqis carried out themselves.

"They are now more passive than before," he said of U.S. troops. "I also feel that the Americans soldiers are frustrated because they used to have many patrols, but now they cannot. Now, the American soldiers are in prison-like bases as if they are under house-arrest."

Outside urban areas, where U.S. troops are still free to move without Iraqi approval, Americans are assisting with the search and arrest of insurgents, manning checkpoints and continuing ongoing efforts to train Iraqi forces - from medics to helicopter pilots. U.S. soldiers recently advised Iraqi soldiers during a seven-hour humanitarian aid drop in Diyala province.

In Washington, Defense Secretary Robert Gates and the highest-ranking U.S. military officer, Joint Chiefs of Staff Adm. Mike Mullen, downplayed reports of tension. Both said cooperation is going well, and Gates said he has heard nothing to suggest that U.S. forces are in greater danger.