A bus carrying people to a religious festival plunged off a bridge on a mountain pass and burst into flames in South Africa on Thursday, killing at least 45 people, authorities said.

The only survivor of the crash was an 8-year-old child, who was receiving medical attention, according to authorities in the northern province of Limpopo. They said the child was seriously injured.

The Limpopo provincial government said the bus veered off the Mmamatlakala bridge and plunged 50 meters (164 feet) into a ravine before busting into flames.

Search operations were ongoing, the provincial government said, but many bodies were burned beyond recognition and still trapped inside the vehicle.

Authorities said they believe the bus was traveling from the neighboring country of Botswana to the town of Moria, which hosts a popular Easter pilgrimage. They said it appeared that the driver lost control and was one of the dead.

Minister of Transport Sindisiwe Chikunga was in Limpopo province for a road safety campaign and changed plans to visit the crash scene, the national Department of Transport said. She said there was an investigation underway into the cause of the crash and offered her condolences to the families of the victims.

The South African government often warns of the danger of road accidents during this time of year, which is a particularly busy and dangerous time for road travel. More than 200 people died in road crashes during the same weekend last year.

(AP)