Darmstadt (dpa / lhe) - Four people were injured in a rear-end collision involving two trams in Darmstadt. The police said on Thursday that there were three passengers and a tram driver. Two women aged 48 and 87 were slightly injured and an 18-year-old was seriously injured. The 62-year-old tram driver was also taken to hospital with minor injuries. According to initial findings by the police, the accident happened at a bus stop. The cause of the crash has not yet been clarified.