North Korea Yongbyon nuclear site 'in operation'

North Korea says its main nuclear facility, the Yongbyon complex, has resumed normal operations. 

Yongbyon's reactor was shut down in 2007 but Pyongyang vowed to restart it in 2013, following its third nuclear test and amid high regional tensions. 

The reactor has been the source of plutonium for North Korea's nuclear weapons programme. 

Experts believe that if re-started, the reactor could potentially utilise the plutonium to make one bomb per year. 

The announcement about Yongbyon is the first official confirmation from North Korea that it has restarted operations.
 
BBC