(CNN) An explosion ripped through a busy square in the Turkish capital Sunday afternoon, killing at least 27 people and wounding 75 others, the Ankara governor’s office said.
Scores of police cars, firefighters and medical personnel rushed to the scene. Security forces evacuated the area, the official Turkish news agency Anadolu reported.
Authorities haven’t released details about what caused the blast.
“It’s too early to talk about who carried out this attack. The investigation is ongoing,” a senior Turkish official said. “Our priority right now is the wounded.”
The explosion apparently targeted a transportation hub where bus stops and a metro station are located in the Kizilay neighborhood, Anadolu said.
A bombing that targeted military vehicles in the capital in February killed at least 28 people.
Last week, the U.S. Embassy in Ankara warned of a possible terrorist plot to strike government buildings in the capital’s Bahcelievler neighborhood, which is just a few minute’s drive from the square where Sunday’s explosion occurred.