La Paz, Jan. 20 -- A head-on crash between two buses on the Oruro-Potosi highway in southwest Bolivia on Saturday left at least 22 dead and more than 30 others injured, said local police.

The accident occurred in the early morning hours of Saturday when two buses from the companies of Trans Azul and Trans Imperial crashed on the highway some 40 km from the city of Challapata, Romulo Delgado, commander general of the police, told reporters.

The injured have been taken to hospitals in Challapata and the city of Oruro. The incident was under investigation," the head of police said.

According to preliminary police report, the accident could have been caused due to excessive speed and one of the buses may have crossed into the oncoming lane...