At least five people were killed, and ten others were injured in an explosion at a gas station in Makhachkala, Dagestan, southern Russia, on Monday evening. Local emergency services reported that the fire broke out over an area of 500 square meters. Russian news agency TASS quoted authorities expressing concerns about possible further explosions and fires. Unverified videos on social media showed a large fire and several injured individuals at a local hospital. Eyewitnesses reported that the blast wave was very strong and felt in apartments and houses. The preliminary cause of the explosion is believed to be an exploding gas cylinder at the gas station.