North Korea's Yongbyon nuclear site including reactor has 'started normal operations'

North Korea confirmed today that the nuclear reactor seen as the country’s main source of weapons-grade plutonium had resumed normal operations.

The confirmation, by the head of the North’s Atomic Energy Institute (AEI), raises a further red flag amid growing signs the North may be considering a long-range rocket launch next month in violation of UN resolutions.

In an interview with the North’s official KCNA news agency, the institutes’s director said all facilities at the Yongbyon nuclear complex - including a five-megawatt reactor - had “started normal operations”.

Read more: North Korea has re-started plutonium reactor, warn US analysts

North Korea mothballed the Yongbyon reactor in 2007 under an aid-for-disarmament accord, but began renovating it after its last nuclear test in 2013.

Since then, satellite imagery analysis has suggested the partial and intermittent restart of the reactor which, when fully operational, is capable of producing around six kilos of plutonium a year - enough for one nuclear bomb, experts say.

The AEI director, who was not named, said scientists and technicians had been “steadily improving” both the quality and quantity of the North’s nuclear deterrent and issued a by-now standard warning to the United States.

Read more: Is Kim stepping up his nuclear weapons programme? Satellite image shows North Korea is 'refurbishing uranium facility'

“If the US and other hostile forces persistently seek their reckless  hostile policy ... (North Korea) is fully ready to cope with them with nuclear weapons any time,” he said.