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. Last Updated: 07/27/2016

One Dead, 2 Injured in St. Pete Blast

An explosion tore through an apartment building Tuesday in St. Petersburg, killing one and wounding two others, officials said.

The blast occurred at around 9 a.m. in a service room in a 10-story building on Ulitsa Korneyeva in southwest St. Petersburg, Gennady Yashin, head of the Kirov District branch of the Investigative committee, said by telephone.

Investigators believe a grenade -- fragments of which were found at the scene -- may have been detonated, Yashin said.

It was unclear, however, why the grenade might have been kept in the storage room, Yashin said. A criminal case has been opened in connection with the possession and trafficking of illegal weapons, he said.

Killed in the blast was a 40-year-old man who died of his injuries in the hospital, Yashin said. Peter Guk, a 27-year-old plumber, and Viktor Petrov, 37, were hospitalized with serious injuries, he said.