At least 10 people were killed and seven others injured on Sunday when a minibus smuggling migrants crashed in southern Bulgaria, the country's Interior Ministry announced in a statement.

The crash took place on a highway near Pazardjik, which is close to Bulgaria's borders with Greece and Turkey.

Police said the passengers who were killed did not have any identification documents with them, but survivors of the accident told authorities that they were Pakistani and Afghan nationals.

Nine of those who died were migrants. The 10th victim was a 16-year-old Bulgarian who was apparently driving the bus. The Interior Ministry reported that the driver had a criminal record and no license.

The Bulgarian television channel bTV reported that the teen likely fell asleep behind the wheel. The Interior Ministry's statement reported that the exact cause of the crash was still under investigation.

Watch video 02:06 Share Dead-end Balkan Send Facebook google+ Whatsapp Tumblr linkedin stumble Digg reddit Newsvine Permalink https://p.dw.com/p/2YmuS Stranded on the Balkan route

Entry point

Bulgaria, an EU member, has become a main entry point for migrants traveling to Western and Northern Europe via the officially closed Balkan route. Recently, the country has seen a fall in the number of people illegally crossing its southeastern border with Turkey, which is almost completely sealed with a razor wire-topped fence.

In May, Bulgarian authorities estimated that about 3,000 people have entered the country and continued their journeys illegally so far this year.

Another 3,000 people remain stranded in Bulgaria's refugee shelters, according to the latest data from the Interior Ministry.

rs/jm (AFP, dpa)