A minimum of six miners had been killed whereas three others trapped after an explosion inside a coal mine on Friday (native time) in Colombia.
The authorities have begun an investigation to determine the causes of the incident, reported Xinhua. Efforts are underway to rescue the trapped staff.
Angelmiro Berbesi, director of the Danger Administration Workplace within the municipality of El Zulia, was quoted as saying that the explosion apparently occurred because of the accumulation of gases contained in the mine.