At least 12 people have been killed and dozens more injured in a series of crashes on both sides of a highway in Bulgaria on Tuesday, Bulgarian authorities said.

According to the interior ministry, a bus and truck collided, leading to a pileup on the side of the A1 highway near the southeastern city of Yambol.

Weather conditions believed to be a factor

Speaking to reporters at the site, ministry's general secretary Ministry Lyubomir Nikolov said that fog was likely the cause of the accident.

The regional governor of Yambol Georgi Chalakov, said an estimated 50 cars and trucks were involved in the accident.

Health Minister Katya Ivkova said 10 people “died on the spot” and two others died while being transported to a hospital. She said 46 people were also injured and transported to medical facilities.

Prime Minister Rumen Radev, who was welcoming European Commission President Ursula von der Leyen , cleared his schedule for later Tuesday.…