At least 28 people have been killed several others injured on Monday after a bus plunged off a mountain highway in central Mexico.

Police has said that the bus careened from a mountain pass connecting Mexico City and Tampico, the main city in northeastern Tamaulipas state, tumbling some 200 meters into a ravine.

About 50 rescue members from the Federal Preventive Police, firemen & a helicopter went to help the victims. It is feared that the number of deaths could rise. The police said the cause of the accident is under investigation.