KABUL, Afghanistan (AP) — Three civilian police training advisers, two American and one British, were killed over the weekend by an Afghan policeman at a training academy in western Afghanistan, Afghan officials and a NATO official said today.

In a separate incident, the NATO official said two service members with the U.S.- led coalition were wounded today when an Afghan soldier opened fire on them in northern Afghanistan. No other details have been disclosed about that shooting.

The official spoke on condition of anonymity because the two incidents are still under investigation.

Afghan security forces or militants dressed in their uniforms have been killing a rising number of coalition forces, but they have not been specifically targeting civilian contractors working for the coalition.