Five people have been killed and 22 wounded in what authorities in Turkey are calling a "terrorist attack." The attack took place at an aerospace company near the capital, Ankara, on Wednesday.

Witnesses said they heard gunfire and an explosion at the company, Turkish Aerospace Industries. Interior Minister Ali Yerlikaya said two of the assailants were killed but did not say who was behind the attack. No one has claimed responsibility.

Investigators are trying to identify the assailants who were killed to determine who they might be linked to.