Prime Minister Tony Blair said Tuesday the world should be very worried about North Korea's claim of a nuclear test.
"We have been working on this for many years to try and make sure that nuclear weapons are not proliferated, and they are doing this in complete defiance of all their international obligations," Blair said in an interview with British Broadcasting Corp.
"It is a very, very serious situation. We are discussing it with other partners in the UN Security Council, with America, with China particularly, obviously, and therefore work out a way forward," he said.
But Blair said the world also should keep in mind the people of the isolated and impoverished communist country.
"The people live in virtual starvation, almost a form of political oppression akin to slavery, and meanwhile they spend billions of dollars on a nuclear weapons program," Blair said.