Two North Koreans were reportedly arrested and sentenced to eight years in prison in Ukraine by intelligence authorities after they attempted to steal classified intelligence regarding missile technology.

Ukrainian media report that Ryu Song-chul and Lee Tae-kil, both employees at a North Korean trade office in Belarus, traveled to Dnepropetrovsk in 2011 and were arrested after attempting to steal information from Yuzhnoye Design Bureau, which designs satellites and rockets.

The North Koreans were said to be searching for intelligence regarding missile launch technology and increasing the range of its missiles with liquid fuel-fired engines.

The North Koreans apparently received their sentence in late May on allegations of spying after Yuzhnoye employees informed authorities of their suspicious behavior.