The Islamic State group has claimed responsibility for a bomb attack earlier this week in a Russian supermarket in St. Petersburg.
The militants said the explosion was carried out by an Islamic State-linked group, according to a statement made Friday by its Amaq news agency.
The group did not provide any evidence for its claim.
At least 13 people were injured when a homemade bomb detonated in a branch of the Perekrestok supermarket chain on Wednesday.
Health officials said none of the victims suffered life-threatening injuries.
Russian investigators initially said they were treating the case as an act of attempted murder.
However, on Thursday, Russian President Vladimir Putin said the explosion was an act of terrorism. He made the assertion at the Kremlin during an awards ceremony for Russian servicemen who had served in Syria.
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