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According to the Tass news agency, a man threw a cigarette butt into the sewer in Hasavur, Republic of Dagestan, Russia, and caused an explosion, killing himself and his companions.

According to reports, surveillance footage showed that at the time of the incident, the man and his companion parked the car on the roadside, got off the bus and smoked together, and then threw the cigarette butts into the sewer. Subsequently, the cigarette butts ignited the gas in the sewer, causing a violent explosion. The two people were killed on the spot, and even the nearby cameras were tilted.

Reported that failure to follow safety precautions resulted in an explosion of acetylene gas-air mixture in the sewer.

According to preliminary information obtained from the investigation, the two men were housing and public service employees and were doing technical work in a nearby residential building.

Currently, the local police are handling the incident.

Wen| Reporter Leng Shuang