According to local media reports, there was a loud explosion at the site and subsequent gunfire.
“Two terrorists were neutralised” in the incident at the headquarters of the state-run firm, Turkish Interior Minister Ali Yerlikaya wrote on X. The minister said those killed included a male and a female attacker.
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President Recep Tayyip Erdogan, who was holding talks in Russia with Vladimir Putin at the time of the attack, condemned what he said was a “heinous terrorist attack.”
No group has said it carried out the attack.
TAI is one of Turkey’s most prominent defence and aviation companies, producing armed drones and fighter jets.