An explosion tore through a service station in Russia's Caucasus republic of Dagestan on Friday, killing five people and injuring three others, the emergency situations ministry said, Paralel.Az reports citing Barron's.

"The station's building is destroyed. The technical area and the cafeteria are burning over a surface of 500 square metres," the ministry said on Telegram, without giving a cause.

Almost 120 rescuers were working at the scene south of Dagestan's capital Makhachkala, it added.