Nineteen people were killed in a head-on collision between a minibus and car in South Africa, police said Tuesday.

The vehicles caught fire after the collision late Monday in the Free State, Xinhua reported. 

"Some of the people were burned beyond recognition," Sergeant Mmako Mophiring said. Four occupants in the car and 15 in the bus died. Seven others were injured.

The accident occurred when the car tried to overtake another vehicle. The minibus taxi was travelling from QwaQwa to Johannesburg.