ANKARA, Turkey (AP) 鈥 Assailants set off explosives and opened fire in an attack Wednesday on the premises of the Turkish state-run aerospace and defense company TUSAS, killing four people and wounding several, Turkish President Recep Tayyip Erdogan said.

At least two of the attackers died, Interior Minister Ali Yerlikaya said.

鈥淲e have four martyrs. We have 14 wounded. I condemn this heinous terrorist attack and wish mercy on our martyrs,鈥 Erdogan said during a meeting with Russian President Vladimir Putin in the sidelines of a BRICS meeting in Kazan, Russia.

Putin offered him condolences over the attack.

Selim Cirpanoglu, mayor of the district of Kahramankazan, told The Associated Press that the attack on the company in the outskirts of the capital, Ankara, had abated but could not provide more details.

It was not clear who may be behind it. Kurdish militants, the Islamic State group and leftist extremists have carried out attacks in the country in the past.

Security camera images from the attack, aired on television, showed a man in plainclothes carrying a backpack and holding an assault rifle.

Turkish media said three assailants, including a woman, arrived at an entry to the complex inside a taxi. The assailants, who were carrying assault weapons, then detonated an explosive device next to the taxi, causing panic and allowing them to enter the complex.

Multiple gunshots were heard after Turkish security forces entered the site, the DHA news agency and other media reported. Helicopters were seen flying above the premises.

TUSAS designs, manufactures and assembles both civilian and military aircrafts, unmanned aerial vehicles and other defense industry and space systems. The UAVs have been instrumental in Turkey gaining an upper hand in its fight against Kurdish militants in Turkey and across the border in Iraq.

Vice President Cevdet Yilmaz said the target of the attack was Turkey's 鈥渟uccess in the defense industry.鈥

鈥淚t should be known that these attacks will not be able to deter the heroic employees of defense industry,鈥 he wrote on X.

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