KABUL: An Afghan guard shot dead two Nato troops accompanying a reconstruction team convoy travelling in a northern province Saturday, police said.

Police chief Gen. Mohammad Qasim Jangalbagh said the shooting took place in the Darah district of Panjshir province, about 62 miles north of Kabul.

Jangalbagh said the shooter was a bodyguard working for the country's second highest-ranking intelligence official. He said the shooter stopped the convoy, engaged in an argument with Nato troops and opened fire.

Jangalbagh said another Nato soldier fired back and killed the shooter.

Nato said it was investigating the incident and declined to offer additional information.