Oslo, Jul 22 (IANS): A large explosion Friday damaged the office of Norwegian Prime Minister Jens Stoltenberg, BBC reported. At least eight people were injured.
There were conflicting reports on whether Stoltenberg was injured. Initial reports said he was unharmed.
A number of other official buildings were also damaged.
Television picturers showed rubble and glass from shattered windows in the streets, and smoke pouring out from some buildings.
All roads to the city centre have been closed, BBC said quoting the NRK newspaper.
Oistein Mjarum, head of communications for the Norwegian Red Cross, said his offices were close to the blast.
"There was a massive explosion which could be heard over the capital Oslo."
He added that there were fires burning in the 17-storey prime minister's building.