Several people were killed in a terrorist attack that targeted the main facility of the Turkish Aerospace Industry (TAI) in the capital Ankara on Wednesday afternoon.
The media reports that it may have been a suicide bomber.
Interior Minister Ali Yerlikaya confirmed that the explosion heard outside the premises was a terrorist attack, but did not specify further details and said additional statements would follow.
Security forces, ambulances and firefighters were sent to the TAI campus, which employs over 15,000 people.