City officials said the incident occurred when the bus veered off a highway and went into a ravine. Photos released by fire officials showed the bus upside-down in the ravine as t

The bus collided with other vehicles on a main bridge in Guatemala’s capital before falling into a ravine early Monday morning.

A bus veered off a highway bridge into a polluted ravine in Guatemala City early on Monday, killing at least 51 people and trapping survivors, a spokesperson for the city’s fire department said.