( CNN ) -- The body of the driver of one of two commuter trains that collided head-on in western Switzerland has been found in his crushed cab , Swiss police said Tuesday . Twenty-five of the passengers needed hospital treatment after the crash Monday evening , police in the Vaud canton said in a news release , one fewer than had previously been stated . Nine others were treated on the spot for minor injuries and 11 others were unharmed , police said . The train driver who survived , age 54 , was injured and is in hospital , Swiss Federal Railways spokesman Reto Schaerli told CNN . The collision happened just outside the village of Granges-pres-Marnand , about 8 kilometers ( 5 miles ) south of Payerne . Authorities are trying to determine what caused the crash . The latest details were given in a news conference Tuesday by the Vaud police and senior Swiss railways officials . At this early stage , police believe that the train driver who survived was supposed to have waited at the train station in Granges-pres-Marnand until the other train had passed , but did not , Schaerli said . It is not yet clear whether there were any technical or safety failures , he said . Police said the surviving driver had stopped his train at the station to allow passengers to board and disembark . Moments after he set off again , the two trains slammed into each other . The driver had time to apply the emergency brake before the impact , police said . The trains were traveling between Payerne and Lausanne , a city on the shores of Lake Geneva , when they collided . No foreigners were on the trains , according to police . Firefighters used heavy machinery to separate the crumpled trains and access the cab where the 24-year-old driver 's body was found early Tuesday , police said . The local government sent its condolences to the driver 's family . A Swiss Federal Railways statement said `` this is a very sad day and we regret the loss of one of our colleagues as well as those who were injured . '' The line between Lausanne and Payerne will remain closed Tuesday , police said . CNN 's Susannah Palk and Stefan Simons contributed to this report .
The body of one of the train drivers has been removed from his crushed cab , officials say . The head - on collision of two commuter trains in western Switzerland happened Monday . Authorities say the train driver who survived may have left the station too soon . The trains were on a route between Payerne and Lausanne , an official says .