Norway has been warned of an imminent terror attack, the country's justice minister has announced.
Norwegian people have been given no specific advice other than to stay vigilant, the Dagbladet newspaper reported.
The paper's headline said "Islamic extremists" were planning an attack in the coming days.
Yesterday was the three-year anniversary of the bombing and mass shooting in Oslo and Utoya which left 77 people dead.
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The railway administration said the 17 people died of cardiac arrest.
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