"PARIS, Jan 11 (Reuters) - At least 20 people were injured when two trams collided in Strasbourg in eastern France, French media said on Saturday. The Bas-Rhin region's Fire and Rescue Service asked to avoid the area to facilitate access for emergency services. The crash occurred after one of the trams switched tracks and collided with a stationary tram at Strasbourg's central station, BFM TV said."