AlQa'dah 14, 1434, Sep 20, 2013, SPA -- Twenty-two people were slightly injured in Spain on Friday when two suburban trains collided at Barcelona railway station, dpa cited civil protection authorities as saying. One of the trains hit the other from behind. It was not clear if both trains were moving at the time. None of the injured victims needed hospital treatment. The accident caused delays in local rail traffic and forced some trains to take alternative routes. The cause of the accident was not immediately known.