CAPE TOWN, South Africa — A bus carrying worshippers headed to an Easter 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.

The Limpopo provincial government said the bus veered off the Mmamatlakala bridge and plunged 164 feet into a ravine…