NATO troops in Afghanistan have been ordered to halt some joint operations with Afghan security forces after a spate of attacks by their local allies and amid fallout from a controversial anti-Islam video.

"Most partnering and advising will now be at the battalion level and above," White House Press Secretary Jay Carney told reporters Tuesday. "This does not mean there will be not partnering below that level. The need for that will be evaluated on a case-by-case basis."

But Carney stressed that the broader strategy of handing security over to local and national forces would continue and that the new policy will not effect NATO's planned withdrawal for 2014.

"In response to an increased threat situation as a result of the 'Innocence of Muslims' video, plus the recent insider attacks, ISAF forces are increasing their vigilance and carefully reviewing all activities and interactions with the local population," Maj. Lori Hodge, a spokeswoman for the NATO-led International Security Assistance Force, said earlier Tuesday.

"We adjust our force protection measures based on the threat. If the threat level goes down, we could see a rolling back on this decision."

The "Innocence of Muslims" video, which was privately produced in the United States, mocks the Prophet Mohammed as a womanizer, child molester and killer.

The U.S. government has condemned the video, which spurred deadly protests in several countries, including Afghanistan.

On Tuesday, for example, an insurgent group carried out a suicide attack that killed 12 people, including eight foreigners in Kabul, saying it was in response to the film.

The other factor behind the partial joint operations suspension is the number of "green-on-blue" attacks in the country.

More than 50 coalition troops were killed between January and mid-August in instances where uniformed Afghans turned their guns on allied troops.

NATO's senior civilian representative in Afghanistan, Simon Gass called the need for the new policy a "bump in the road," adding that "people in all of our countries would expect us... to make sure that our soldiers are kept out of harms way as much as possible."

"The circumstances in which we have reduced our partnership operations are not ideal by any means at all, they are not what we would have wanted," he said. "Nor are they a great strategic set back."

On Monday, the Pentagon said that NATO commander Marine Gen. John Allen had ordered commanders "to review force protection and tactical activities."

"While some partnered operations are temporarily suspended, many continue, and regional commanders have the authority to approve more," Pentagon press secretary George Little said.

Allen's guidance was given at the recommendation of key Afghan leaders, Hodge said.

"This will likely lead to adjustments in exactly how, when and where ISAF troops operate, especially during the current period of heightened tension," she said.

British Defence Secretary Philip Hammond, meanwhile, insisted Tuesday that, "There has been no change of policy in Afghanistan" for British forces.

Speaking to the House of Commons, Hammond cited a press release issued by the ISAF commander saying "some prudent, but temporary, measures to reduce our profile and vulnerability to civil disturbances or insider attacks" have been put into place. Hammond echoed Carney's statement from the White House, saying "partnering and advising" would take place at the battalion level and above.

"The change does not mean that where will be no partnering below that level. The need for that will be evaluated on a case-by-case basis and approved by the regional commanders," Hammond added.

Over the weekend, four Americans and two British troops were gunned down in attacks believed to involve Afghan police.