– Cho Tai-young, spokesman, South Korea's foreign ministry
The government deeply regrets that North Korea made such a statement and we again strongly urge North Korea not to make any further provocations, including a nuclear test.
Glyn Davies, the US special envoy on North Korea policy, was speaking to reporters in South Korea's capital Seoul when he said:
– Glyn Davies, US special envoy on North Korea policy
Whether North Korea tests or not, it's up to North Korea. We hope they don't do it, we call on them not to do it. It will be a mistake and a missed opportunity if they were to do it.
North Korea's declaration they would undertake a nuclear test and more long-range rocket launches follows the United Nations Security Council's condemnation of the country on Tuesday.
The UN expanded sanctions against the regime for launching a rocket in December.
North Korea said the launch was a peaceful satellite mission, but the US and others said it was a test of long-range missile technology.
North Korea plans to undertake a third nuclear test and more long-range rocket launches which will be targeted at its "enemy" the United States, its Defence Commission was quoted as saying by the country's state news agency.
North Korea's top military body said:
We are not disguising the fact that the various satellites and long-range rockets that we will fire and the high-level nuclear test we will carry out are targeted at the United States.