UPDATE 5:00 PM GMT:
A huge thanks to @larsiusprime for translating for me.
Police say at press conference 15 confirmed injured. 2 confirmed dead.
They're also urging the public to avoid large groups.
They're saying it's too early to speculate about motive...
Telling people to avoid large groups, stay home, get out of Oslo center, all buildings have been secured.
Also warning people not to "overdramatize" but that all emergency personel are there and they're working as hard as they can.
Police are NOT confiming that it was a car bomb, ARE saying it was "one or more bombs",
Police wrap up at 5:15 GMT, saying that they will have another conference in an hour or so when they can confirm more things.