What happened

Gas leaking from an underground pipeline accumulated inside a mosque in Fatullah, Narayanganj, during evening prayers. Fire officials said the sealed windows allowed gas to build up, and a spark from an air conditioner being switched on triggered the explosion. At least 24 people were killed, including a seven-year-old boy, and dozens more were treated for severe burns covering up to 90 percent of their bodies. The disaster prompted scrutiny of Bangladesh's state gas-distribution infrastructure and illegal pipeline connections in the area.

When cited sources give different casualty, damage or spill figures for this event, they’re reported side by side above rather than merged into one number. See how confidence levels work.