A police car is parked in front of the U.S. Embassy in Ankara, Turkey August 20, 2018. (Reuters photo)

ANKARA, Aug. 20 (Xinhua) -- Unidentified assailants fired gun shots at the U.S. embassy in Ankara early Monday, hitting a window of a security cabin but causing no casualties, local media reported.

At least four gunshots were reportedly fired in front of Gate 6 of the embassy from a white car at around 5 a.m. (0200 GMT) local time, broadcaster CNN Turk reported.

Police are searching for the suspects who reportedly fled in a white car before the car's license plate number could be seen.

Impacts of bullets are seen in a window of the U.S. Embassy in Ankara, Turkey August 20, 2018. (Reuters photo)

The embassy is set to close this week for an official public holiday to mark the Eid al-Adha festival.

The attack comes amid high tension between Ankara and Washington over the detention of a U.S. pastor in Turkey. The U.S. diplomatic missions in Turkey have been targeted several times in the past.