At least 54 people were killed after a bus veered off a bridge into a ravine in Guatemala City on Monday, according to the country’s National Institute of Forensic Sciences.

At least 56 people are dead after a bus plunged off a bridge Monday on the outskirts of Guatemala's capital, Guatemala City Fire Department spokesman Carlos Hernández told CBS News.

A bus plunged into a ravine early Monday in Guatemala City, killing at least 54 people and injuring at least 20 others.