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STOCKHOLM (Reuters) - Swedish authorities began an investigation into possible arson on Monday after a fire damaged the facade and roof of a Shi'ite mosque on the outskirts of Stockholm overnight, a police statement said.
Nobody was injured in the fire in the Jarfalla suburb of the Swedish capital, it said.
"The scene of the fire has been sealed off in anticipation of forensic tests," it added.
Swedish authorities are wary of possible reprisals after a man rammed a hijacked beer truck into a busy downtown pedestrian mall last month, killing five people. An Uzbek whose asylum request was rejected is being held as the main suspect.
Islamic State, a radical Sunni group that has targeted Shi'ites in several countries, claimed responsibility for a fire last year at a small Shi'ite mosque in Malmo in southern Sweden.
The main suspect in the case was accused on terrorism charges but has been acquitted.
(Reporting by Niklas Pollard; Editing by Tom Heneghan)