«A terrorist attack was carried out against the Turkish Aerospace Industries… Unfortunately, we have martyrs and injured people,» Yerlikaya wrote on X after local media reported a blast and shooting.

He did not provide further details about the attack on the outskirts of the capital Ankara.

It was not immediately clear who may be behind the attack. PKK, ISIL and leftist extremists have carried out attacks in the country in the past.

Media reports said a group of assailants arrived at an entry to the complex inside a taxi during a changing of the security personnel.

At least one of the assailants detonated a bomb, while other attackers managed to enter the complex.

Gunfire at the site continued and some personnel at the complex may have been taken hostage.

Helicopters were seen flying above the premises, local media reported.