More than 40 people were injured on Saturday when two light-rail trains collided at a station in San Francisco, local media reported. One train slammed into the back of another train that was at a platform at about 3 pm (2200 GMT), CBS 5 television news reported. The front car of the train that drove into the other train was smashed in and its windshield shattered, reports were quoted as saying by the German News Agency "DPA".