“We’re to the point now where we can’t trust these people,” a senior military official said. So far this year, 51 NATO troops have been killed in these so-called blue-on-green attacks. Sunday’s attack came a day after two British soldiers were shot dead by an Afghan policeman, Reuters reported.

“It’s had a major impact on our ability to conduct combat operations with them, and we’re going to have to back off to a certain degree,” the official said.

The suspensions of the joint operations are indefinite – according to one official, they “could last three days or three months.”