MOSCOW. Dec 28 (Interfax) - The investigation is looking into all possible theories of the explosion at a supermarket in St. Petersburg on Wednesday, including a terrorist attack, Russian Investigative Committee spokesperson Svetlana Petrenko told Interfax on Thursday.
"The investigation into the blast in St. Petersburg is in its active phase, and all theories of the incident, including a terrorist attack, are being pursued," Petrenko said.
The criminal case is still being investigated on charges of the attempted killing of two or more persons using a generally dangerous method.