ROME (Reuters) - A motorway bridge collapsed on Tuesday over the northern Italian port city of Genoa, killing dozens of people according to the local ambulance service, in what the transport minister said was likely to be “an immense tragedy”. REUTERS/Stringer A section of the bridge crashed down from a height of about 50 meters over a river and some railroad tracks and buildings. At least 10 people were killed and 20 vehicles were involved, local police sources said.