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MOSCOW (Reuters) - Russian online news outlet Fontanka has published the photo of a person whom it said police were seeking over Monday's deadly blast on board a St Petersburg metro train.
The grainy photo shows a middle-aged man with a beard and wearing a black hat.
Fontanka said the man had entered "Petrogradskaya" station 20 minutes before the blast happened on board a train, killing at least nine people.
Interfax news agency earlier quoted a source as saying that surveillance cameras had captured photos of the blast suspect.
Reporting by Christian Lowe; Writing by Sujata Rao; Editing by Alexander Winning