Very little is out there online yet but I saw this link and used Google Translate:
http://www.aftenposten.no/...
I have done a few edits where the translation did not seem to work:
Norwegian to English translation
The only thing we know is that there is a kind of explosion. We are on the way out there, after the short and hasty message ... [from] the police in Oslo for the call just after half past four.
Several injured
Both windows in the government quarter and VG building is blown out, according to Aftenposten's report on the site. They look more damaged.
- The police tell us that we need to get us off, we need to get off. There may be more bombs, tells reporters.
They say that there is broken glass everywhere, the burning of buildings.
- I see people with blood on his face and hands, telling Aftenposten reporter.
Entire facades blown out
Our reporter passed Market Street and there is full chaos people running around bewildered. Several places are a fire alarm.
You can smell the sulfur fumes.
Shop Denim Gallery has ... the facade blown out
A huge [untranslated] rose several hundred feet in the air. Large parts of Oslo heard a huge explosion ... literally shook when the explosion happened
At ... half four in the afternoon.
Update: There are images here:
http://twitcaps.com/...
7:22 AM PT: It is now at the BBC site:
http://www.bbc.co.uk/...
7:22 AM PT: BBC says, "The blast is thought to have caused damage to the offices of Norwegian Prime Minister Jens Stoltenberg and a number of other official buildings.
Mr Stoltenberg was unharmed, said local media, but witnesses said at least eight people were injured in the city centre explosion."
7:25 AM PT: Now on MSNBC: http://www.msnbc.msn.com/...
7:26 AM PT: MSNBC says oil ministry on fire and "tangled wreck of a car" was outside one building. Blast was felt 4 miles away
7:28 AM PT: Link to the Telegraph updates (thanks aggieric): http://www.telegraph.co.uk/...
7:30 AM PT: Reuters says "the damage appeared consistent to witnesses with that from car bombs." http://www.reuters.com/...
7:35 AM PT: AP story: "OSLO, Norway (AP) -- A loud explosion shattered windows Friday at the government headquarters in Oslo which includes the prime minister's office, injuring several people." "Witness Ole Tommy Pedersen was standing at a bus stop about 100 meters (yards) from the high-rise at around 3:30 p.m. (1330GMT) when he saw the blast shatter almost all windows of the 20-floor highrise. He said a cloud of smoke is billowing from the bottom floors."
7:40 AM PT: BBC liveblog on left side of screen here: http://www.bbc.co.uk/...
7:43 AM PT: Telegraph says, "It is holiday time in Norway so many people would have been away on holiday. Locals are saying the streets are much quieter than there would have been at other times of the year."
7:45 AM PT: CNN article is here: http://www.cnn.com/...
7:45 AM PT: CNN: "A first explosion was followed by a second, a reporter for Norwegian state broadcaster NRK told CNN on Friday.
One explosion happened near a government building housing the office of Prime Minister Jens Stoltenberg, said the reporter, Linda Reinholdsen. Another hit near the Norwegian parliament, she said."
7:47 AM PT: BBC: "The bomb went of at Youngstorget, in the central parts of Oslo. People are crying in the streets, injured people are taking care of by a huge amount of police and medical forces."
7:49 AM PT: CNN Live blog: http://news.blogs.cnn.com/...
7:50 AM PT: Telegraph: "The BBC has picked up reports from Norwegian TV station that there has been at least one fatality after the explosion. "
7:55 AM PT: BBC: "There were bodies spotted in the government building." Blast broke mirrors a long distance away.
7:58 AM PT: Telegraph: "Reports from NRK suggest that the explosion was caused by a car bomb parked outside the Norwegian Ministry of Justice. Locals have dismissed earlier suggestions that it was a gas explosion. They have said there is no gas network in central Oslo."
8:00 AM PT: More photos here: http://www.bbc.co.uk/...
8:03 AM PT: CNN: "Nick Soubiea, an American-Swedish tourist in Oslo, told CNN he was less than 100 yards from the blast, which he described as deafening.
"It was almost in slow motion, like a big wave that almost knocked us off our chairs," he said. "It was extremely frightening."
8:06 AM PT: Telegraph reporting 2 dead. Also, "Aftenposten.no has reportedly been told by police that there are still two bombs but they do not know where they are."
8:09 AM PT: ABC News: US government sources on the scene say a massive vehicle bomb was the cause of the blast(s). http://abcnews.go.com/...
8:12 AM PT: Telegraph: "Norwegian police have confirmed for the first time that the explosion was a bomb. "
8:13 AM PT: Well folks, I am going to have to go so can no longer update. Thank you for reading along.