There are confused reports about the cause of the attack or indeed how many terrorists were involved in the attack, however, two have been shot dead at the scene, local media reports.
Interior Minister Ali Yerlikaya said on social media "A terrorist attack was carried out against the TUSAS facilities in Kahramankazan, Ankara. Unfortunately, we have martyrs and injured people,"
Some images indicate two attackers, getting out of a yellow car, probably a taxi, carrying assault rifles and backpacks as they entered the building and started an attack with a loud explosion then taking place.
Anadolu also said prosecutors had launched an investigation into the attack.
It is understood that TIA is a big company that is a licenced manufacturer of the F-16 fighter jets, it also plays a key role in modernizing older aircraft used by the Turkish military. The company is mostly jointly owned by the Turkish Armed Forces and a civilian arm of the national government. It also builds drones, transport aircraft and surveillance aircraft.
Mark Rutte, NATO's new secretary general said: "NATO stands with our ally Turkey. We strongly condemn terrorism in all its forms and are monitoring developments closely."
Recep Tayyip Erdogan, who is currently in Russia for the trade summit of BRICS and meeting with President Vladimir Putin, with whom he shares a warm relationship, said: "We have four martyrs. We have 14 wounded. I condemn this heinous terrorist attack and wish mercy on our martyrs."
Social media access has been halted in Turkey at the moment, with many users trying to access sites via the use of VPNs and satellite communications devices.
