According to Turkey's official news agency, Turkish Aerospace Industries' (TUSAS) headquarters was the scene of an explosion.

Following the blast, Turkey's Anadolu Agency reported hearing gunfire. 

Without providing specifics, Turkish Interior Minister Ali Yerlikaya described it as a "terrorist attack" in a tweet.

Several individuals were killed or injured in the incident, he added, and further details will be released soon.

According to Anadolu, the area was roped off and company workers were taken to safety in bunkers. 

TUSAS is a developer and producer of aerospace systems, such as combat aircraft and drones. 

Türk Havacılık ve Uzay Sanayii AŞ. (TUSAŞ) Ankara Kahramankazan tesislerine yönelik terör saldırısı gerçekleştirilmiştir.

Saldırı sonrası maalesef şehit ve yaralılarımız bulunmaktadır.

Şehitlerimize Allah’tan rahmet; yaralılarımıza acil şifalar diliyorum.

Gelişmelerden kamuoyu…

— Ali Yerlikaya (@AliYerlikaya) October 23, 2024

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Footage from the scene broadcast by local media initially showed large clouds of black smoke and a large fire raging at the site in Kahramankazan, a small town some 40 kilometers (25 miles) north of the capital Ankara.

Turkish private NTV television 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, NTV reported.