02:05 - Source: CNN
Why are attacks so frequent in Turkey?

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NEW: Turkish state media report 15 people arrested

The explosion occurred in central Turkey near bus carrying soliders

CNN  — 

A car bomb exploded near a public bus in Turkey on Saturday, killing 13 soldiers and wounding 55 people, according to Turkish officials.

Authorities later arrested 15 people, the country’s Anadolu state news agency reported, citing prosecutors.

Civilians may have also been wounded in the blast, according to the Turkish Armed Forces. Of the injured, six people are in critical condition, said Turkey’s Health Minister Recep Akdag.

A vehicle rigged with a bomb exploded next to the bus – which was transporting off-duty soldiers, Anadolu reported. The blast happened near Erciyes University in the central province of Kayseri, according to a tweet from Anadolu.

Turkey’s President Recep Tayyip Erdogan and Prime Minister Binali Yıldırım are being briefed on the situation, according to the news agency.

A police officer and people walking next to the wreck of public bus following an explosion on December 17, 2016 in Kayseri, central Turkey.

A video showed a decimated bus with smoke rising out of the vehicle.

Immediately after the blast, at least a half dozen ambulances arrived on the scene. Images showed people with head wounds and at least one person being taken away on a stretcher.

The attack came exactly a week after a pair of bombings in Istanbul killed 44 people, including 37 police officers, and injured 155 others. The two explosions last Saturday occurred after a heavily attended soccer game at Besiktas Vodafone Arena.

A Kurdish militant group called the Kurdish Freedom Hawks claimed responsibility for last week’s bombings. It stated on its website that the Turkish people were not the target of the attack.

The latest violence follows a wave of deadly bombings that have struck Turkey this year.

Timeline: Turkey’s bloody year

CNN’s Isil Sariyuce, Gul Tuysuz and Onur Cakir contributed to this report.