Reuters reports that the suicide bomber struck Monday during a NATO patrol in the eastern city of Khost. In addition to the three soldiers killed, four police, an Afghan interpreter, and six civilians died in the blast. At least 37 civilians were injured, according to Provincial Governor Abdul Jabar Nahimi.

A witness told Reuters that the suicide bomber was wearing a police officer’s uniform when he detonated his explosive-laden motorcycle. The witness said that a patrol of US soldiers was in the vicinity at the time. A NATO spokesperson would only confirm that there had been a suicide bombing.

Reuters notes that while the Afghan Taliban claimed responsibility for the bombing, the group is quick to claim any attack that results in the deaths of foreign soldiers.