A fire at a petrol station in the Dagestan region in southern Russia killed at least 30 people, including three children, and injured more than 70 others. Russian authorities said the fire started at a roadside car repair shop near Makhachkala, the capital of Dagestan. It took firefighters more than three and a half hours to put out the blaze, which spread into an area covering 600 square metres, Tass reported. A criminal investigation has been launched into the cause of the fire