Officials said 13 people were injured Wednesday when an improvised explosive device went off at a storage area for customers' bags at the supermarket in St. Petersburg.
Egypt condemns the terrorist attack in a St.Petersburg store on Wednesday in Russian Federation in the strongest terms, a statement issued on Thursday by the Egyptian foreign ministry said.
A total of 10 people were injured, the Russian state-run news agency Sputnik said.
Alexander Klaus, the head of St Petersburg's investigative committee, said according to the Associated Press (AP): "All possible versions of what has happened are being worked on. At the moment, the lives of those injured are not under threat".
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The incident took place in the Perekrestok supermarket, which is located on the ground floor of the Gigant Hall leisure centre in the city's northwest Kalininsky district.
A policeman stands guard near a supermarket after an explosion in St Petersburg, Russia December 27, 2017.
Preliminary data shows that an explosive device found at the scene contained 200 grams (7 ounces) of TNT, state-run RIA news agency reported.
The bomb was strong enough to blow the door off the supermarket and punch a hole in the wall.