An explosion has been reported outside the headquarters of an aviation company near Ankara, in an incident the authorities have labelled a terror attack.

Initial images shown by the television channel were of a large cloud of smoke in front of the entrance of Turkish Aerospace Industries, located some forty kilometers outside the capital.

They said that the blast took place around the time of a shift change, and staff had to be directed to shelters.
Firefighters and medical teams have been dispatched to the scene.