More than a dozen people were injured in an explosion at a St. Petersburg supermarket Wednesday, according to Russian state media.
President Vladimir Putin called the blast a “terror attack” during an address to military officers Thursday in Moscow, calling for a full investigation.
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 device was inside a locker at a chain supermarket called Perekrestok, located in an entertainment complex.
Tass reported that the Investigative Committee of the Russian Federation has opened a criminal investigation into the explosion, citing Svetlana Petrenko, an official representative for the committee.
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SOURCE: CNN, Mary Ilyushina and Lawrence Davidson