Norway raises threat level after Oslo bomb scare

The "bomb-like device", which was about 30cm wide, was made safe by police after it was discovered on Saturday night.

Oslo's bomb squad used a remote-controlled robot to set off a controlled explosion of the one-foot across bomb-like device, according to Reuters.

He was detained on charges of handling explosives, though police noted they were not yet certain if he had planned to carry out an attack with the device, which authorities defused before it could be detonated. The police Twitter account said it had been neutralized.

The device had appeared to be capable of causing only a limited amount of damage, the police said earlier.

The explosive was found on the street just outside the Groenland underground station and police swept through the area to remove people from bars and restaurants.

"Every restaurant was being closed", 23-year-old witness Malin Myrvold said. "You could see cops in heavy armor going in every store and restaurant".

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"(Norwegian security service) PST is now working on finding his intentions and find out whether others are involved", said chief prosecutor Signe Aaling.

"We were trying to see what was going on".

Police added: "We're now awaiting further necessary investigations".

"There are several reasons as to why we have taken over the case", PST spokesman Martin Bernsen told the Aftenposten daily.

The main suspect in that attack, a 39-year-old man from Uzbekistan, had shown an interest in jihadist groups like IS and had had his permanent residency application rejected, police said Sunday. It was unclear whether he was also a Swedish citizen or resident or even how long he'd been in the country.

Memories are still fresh in Norway of the July 2011 twin attacks perpetrated by rightwing extremist Anders Behring Breivik, who killed 77 people in a bombing near the government offices in Oslo and a gun rampage on the Utoya island.

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