Afghan police say a rogue Afghan guard has shot dead two NATO troops and wounded a third in a northern province.

The police chief of Panjshir province, General Qasim Jangalbagh, said the guard opened fired on the NATO soldiers Saturday as they were traveling with a reconstruction convoy in the province. A NATO service member fired back and killed the guard.

NATO has said more than 280 of its service members have died in Afghanistan this year.

The latest shooting of NATO personnel by Afghan forces is one of several that have hindered the war effort in the country. A rogue Afghan solider killed an Australian soldier in late May.

Also Saturday, NATO says Afghan and international forces detained an explosives expert from the Islamic Movement of Uzbekistan, along with one of his associates. The two were detained in Kunduz province during an overnight operation.

NATO also said one of its service members and one civilian working with the alliance died Saturday following an attack in eastern Afghanistan. NATO says it is investigating the incident.