The blast was caused by a homemade explosive device with the power equivalent to 200 grams of TNT, investigators said.

10 injured in Saint Petersburg supermarket bombing

Investigators have opened a criminal case.

Blast by 'homemade explosive device' rips through St Petersburg supermarket, 4 injured

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blast in-st-petersburg

10 injured in Saint Petersburg supermarket bombing

Blast by 'homemade explosive device' rips through St Petersburg supermarket, 4 injured