Story highlights No group has claimed responsibility for what the military calls a terror attack

Twenty-eight people are dead and 61 are injured, an official says

The explosion hit military vehicles

(CNN) An explosion hit military vehicles at an intersection in the Turkish capital of Ankara on Wednesday evening, officials said, in what the military called a terror attack.

Twenty-eight people were killed and 61 others were injured, according to Deputy Prime Minister Numan Kurtulmus.

Photos: Explosion rocks Turkey's capital Photos: Explosion rocks Turkey's capital Firefighters work at the scene of a deadly explosion in Ankara, Turkey, on Wednesday, February 17. The explosion hit three military vehicles and a private vehicle near parliament buildings, reported Turkey's semiofficial Anadolu news agency. Hide Caption 1 of 6 Photos: Explosion rocks Turkey's capital An injured person receives medical treatment on February 17. The cause of the blast wasn't immediately available. But Ankara Gov. Mehmet Kiliclar said it may have been caused by a car bomb, according to Anadolu. Hide Caption 2 of 6 Photos: Explosion rocks Turkey's capital Twenty-eight people were killed and 61 others were injured in the blast, according to Deputy Prime Minister Numan Kurtulmus. Hide Caption 3 of 6 Photos: Explosion rocks Turkey's capital People react at the scene of the explosion. Hide Caption 4 of 6 Photos: Explosion rocks Turkey's capital A firefighter tries to put out the blaze. Hide Caption 5 of 6 Photos: Explosion rocks Turkey's capital Smoke billows from the blast site. Hide Caption 6 of 6

The explosion hit three military vehicles and a private vehicle in central Ankara, near Turkish Parliament buildings, Turkey's semiofficial Anadolu news agency reported, citing Ankara Gov. Mehmet Kiliclar. The vehicles were stopped at a traffic light, the military said.

Authorities believe a bomb-laden vehicle caused the explosion, Kiliclar said, according to Anadolu.

Video aired on CNN Turk showed large flames reaching toward the night sky from an area on the ground. Lights from numerous emergency vehicles flashed nearby.

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