( CNN ) -- A bus crashed into the side of a mountain Tuesday in western Bolivia , killing at least 13 people and injuring another 26 , the government news agency reported . The driver lost control of the bus , which gained speed and smashed into rocks on the side of the road , said police official Victor Hugo Ona . The bus left the city of La Paz with 28 passengers but was later found to have 41 passengers and excess baggage , Ona told the state-run Agencia Boliviana de Informacion . Among the dead were seven men , four women and two minors , said Jose Villarroel , another police official . At least 19 of the injured were hospitalized . Bus driver Pedro Limachi , 45 , was listed among the injured being treated at the Hospital Arco Iris in La Paz . The bus was operated by the Flota Yunguena transit company . Bolivia 's mountainous roads often prove fatal . A bus crash in central Bolivia in June left 28 dead and 44 injured after an apparent brake failure , police said at the time . That bus , which plunged into a ravine , was owned by the El Dorado company . A January bus accident killed 22 people . And 19 people died and 26 were injured in August 2009 when a bus plunged off a mountain road .
Bolivia : Driver lost control of the bus , which crashed into roadside bushes . At least 20 people were injured . Bus driver and 18 others were being treated at a hospital , the official says . Fatal bus wrecks are not rare in mountainous areas .