US suspends most joint operations with Afghan forces The U.S. military has suspended the bulk of joint field operations with Afghan troops amid a wave of so-called insider attacks and concern about protests over an anti-Islam film. Fox News has learned that while U.S. troops are still patrolling, as are the Afghans, the two sides are not running operations together for the time being without special approval. Fox News was told the step is a temporary measure. The move comes after Afghan police on Sunday killed four American soldiers, and a gunman in an Afghan militia uniform shot dead two British soldiers a day earlier. It also comes in the wake of the week-long wave of protests across the Muslim world over an anti-Islam film. NATO's International Security Assistance Force put out a statement stressing that ISAF took "some prudent, but temporary, measures to reduce our profile and vulnerability to civil disturbances or insider attacks" in response to the protests. This means that in some local instances, operational tempo has been reduced, or force protection has been increased. These actions balance the tension of the recent video with force protection, while maintaining the momentum of the campaign," the statement said. ISAF stressed that NATO forces are "absolutely committed to partnering with, training, advising and assisting" Afghan forces. But the move underscores the sustained trust problems NATO forces have had in preparing the Afghan security force to eventually take over. U.S. Defense Secretary Leon Panetta said Tuesday the U.S. is concerned about the impact insider attacks are having on its forces in Afghanistan. He said the attacks do not mean the Taliban are succeeding. Fox News' Jennifer Griffin and Justin Fishel and The Associated Press contributed to this report.