Johannesburg - It is too early to say what caused the train crash near the Booysens station in Johannesburg on Friday night, in which more than 100 people were injured, Metrorail said."It is too early for us now to say what really caused the accident... but I am sure as the night goes on we will be able to give an update," spokesperson Lillian Mofokeng told News24."We've got about 150 people reportedly injured. No fatalities or critical injuries reported yet."She said the priority was attending to the injured commuters and getting others who were on the train to their destinations.The accident has affected other stations and commuters, but Metrorail said it was providing alternative transport."The accident happened around 18:00, which is well within our peak period and there are other trains behind these ones," Mofokeng said."We want to ask commuters to be patient and bear with us as we are arranging alternative transport for them so that they can go to their destinations."All emergency services were on the scene helping with injured commuters.ER24 spokesperson Russel Meiring said, according to unconfirmed reports, two trains collided, causing one of them to partially overturn."Patients were found all over the scene with injuries ranging from minor to serious."Once the patients had been triaged and treated on scene, they will be transported to various hospitals for urgent medical treatment," he said.The cause of the accident would be subject to a police investigation.