Insurgents fired a rocket that hit a NATO helicopter carrying the governor of a key southern Afghan province, but no one was injured, officials said. A series of clashes, airstrikes and bomb blasts elsewhere in the country killed 10 militants and four civilians Saturday. Helmand Gov. Ghulab Mangal and a delegation of British officials were about to land in the provincial town of Musa Qala when an insurgent rocket-propelled grenade struck the CH-47 Chinook helicopter, Mangal told The Associated Press. The grenade "hit the tail end" of the chopper, said Maj. Martin O'Donnell, a spokesman for NATO's International Security Assistance Force.