World leaders have condemned the terror attacks in Norway which have left at least 16 people dead.
Prime Minister David Cameron said the attacks are a "stark reminder of the threat we all face from terrorism", and he has offered Britain's help in finding those responsible.
"We will work with Norway to hunt the murderers who did this and prevent any more innocent deaths," the PM said.
"We can overcome this evil, and we will."
Foreign Secretary William Hague said the UK stands "shoulder to shoulder" with Norway following the attack.
He added: "I send my deepest condolences to all those who have lost relatives or been injured in today's horrific bomb blast in Oslo."
US President Barack Obama said the bombing is a reminder that the world has a role in stopping such terror from happening. He also expressed his condolences to Norway's people.
Nato Secretary-General Anders Fogh Rasmussen called the blast a "heinous act".
And Jose Manuel Barroso, president of the European Commission, expressed his "utmost shock", saying an attack of that magnitude is not "something one would expect in Norway, famously associated with peace at home and peacemaking abroad".