Images of emergency workers at the scene of a bus accident in Guatemala City that killed at least 51 people and left others trapped under the wreckage in a river, according to authorities. Local media says, the bus - carrying 75 people - was travelling to Guatemala City from the town of San Agustin Acasaguastlan in El Progreso department, about 90 kilometers (56 miles) to the northeast. Police are investigating the cause of the accident. IMAGES