A U.S. military adviser was shot and killed by an Afghan policewoman in Afghanistan Monday, officials tell ABC News.

The incident occurred at the police headquarters in Kabul.  Afghan officials say the policewoman used her own pistol to shoot the advisor.  She has since been arrested and remains in police custody.

The International Security Assistance Force has confirmed the shooting, saying in a statement Monday, "A contracted civilian employee of the International Security Assistance Force died after being shot by a woman wearing an Afghan police uniform in Kabul, Afghanistan today."

It is not yet clear whether the shooting was intentional or accidental.  Officials say the policewoman may be linked to Taliban insurgents.

An investigation is currently underway.

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