The US-led international coalition in Afghanistan says two of its service members and one civilian employee have died in an aircraft accident.
A NATO statement says the "aircraft mishap" happened on Friday in eastern Afghanistan.
The alliance provided no details on the accident, and the names and nationalities of those killed were not released.
Four NATO troops have been killed in Afghanistan so far this year. One service member was killed in a suicide attack on January 4, also in eastern Afghanistan, and another on January 1.