Four Bulgarian citizens have perished, and 27 fellow passengers have been wounded when a bus slid off the icy road near the Turkish-Bulgarian border at Derekoy and Malko Tarnovo.

According to Turkish sources, the four (one in his sixties, two in their fifties, as well as a 10-year-old boy) victims of the crash have Bulgarian citizenship, some of them dual Turkish.

10 of the 27 injured people also are Bulgarian citizens, according to information confirmed by the Bulgarian Ministry of Foreign Affairs.

According to Turkish police the driver of the bus lost control over the vehicle because of the ice on the road, which led to the bus falling down a 20-meter slope out of the road.

All of the injured have been transported to the nearby Kirklareli hospital, with the more gravely injured moved to the Edirne medical center.

Just two of them have been kept for treatment as of Sunday evening, with the rest being already released.

Bulgarian consular authorities in Edirne are in full track of the events and have contacted the crash survivors.