As many as 30 people are feared dead after a shooting at a Norwegian youth camp after a bomb hit the capital Oslo killed at least seven. Shots were fired by a man dressed as a police officer at a youth meeting of the ruling Labour Party in Utoya - an island on the outskirts near the capital.
An eyewitness reported seeing between 25 and 30 bodies.
Norwegian police said they thought there could also be explosives on the island.
Around 600 people were believed to be taking part in the summer camp - most of whom were teenagers aged between 14 and 18.
Police said that Prime Minister Jens Stoltenberg had been due to attend the event.
One man was arrested after the incident - he was described as tall and blonde, and spoke fluent Norwegian.
Sky sources reported he was shot and wounded during the arrest.
Police said he was linked to the bombing in Oslo.
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