The death toll from an explosion at a petrol station in Dagestan in Russia's Caspian Sea region has risen to 13, including two children, the emergencies ministry said on Saturday.
The blast, which occurred on Friday outside the regional capital of Makhachkala, also injured 23 people, it said.
Healthcare minister aide Alexei Kuznetsov said that four people remained in hospitals, including one in serious condition, Russian state news agency RIA reported.
Dagenergo, the regional power operator, said on Friday that power supply was partially disrupted in nearby districts..
A local branch of the Investigative Committee, which deals with serious crimes in Russia, said it had opened a criminal case.
Preliminary results showed no traces of explosives at the scene, the committee wrote on Telegram.
Dagestan Governor Sergei Melikov told a briefing that some violations had previously been discovered during inspections of the petrol station but that these had been resolved before the blast, state agencies reported.
More than 130 petrol stations in Dagestan closed over the past year for various violations had resumed operations as a result of local court decisions, Melikov said.

At least 73 injured after Houthi rebels attack Saudi civilian and energy facilities
Nepal rescue focused on workers trapped in three tunnels
Indonesia reopens Jakarta airport, four others after Anak Krakatau ash clears
Russia hits Kyiv after brief pause for US envoys' visit, killing two
Kenya offers temporary amnesty to undocumented East Africans amid crackdown fears
7 Indonesian airports remain shut due to volcanic ash from Anak Krakatau
Bolivia confirms 9 deaths after military base explosion
Israeli strikes on southern Lebanese town kill 11, state news agency saysÂ
