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Suspect in St Petersburg metro blast linked to radical Islamists-Interfax

MOSCOW, April 3 (Reuters) - A suspected suicide bomber thought to be responsible for a deadly blast in the St Petersburg metro on Monday had links with radical Islamist groups banned in Russia, a law enforcement source told Interfax news agency.

The source added that remains found at the scene of the blast suggested that a suicide bomber was responsible but that final conclusions would be made after DNA tests had been conducted. (Reporting by Alexander Winning; Editing by Alison Williams)