Islamabad, Pakistan (CNN) -- Two Pakistani Air Force planes collided in midair Thursday, killing the pilots and injuring people on the ground, according to local police.
The crash occurred during a routine flying exercise near an air force base in the country's northwest, said police spokesman Mohammad Hussain.
Each plane was carrying two pilots. All four died, Hussain said.
Debris from the collision fell on the village of Rakashai, inflicting serious injuries on 11 residents, and triggered a fire, he said.
Two children were among the injured.