North Korea has launched a warship two weeks after it was damaged during an earlier launch attempt, in an incident that drew harsh criticism from the country's leader Kim Jong Un. The 5,000-tonne destroyer, which was restored to balance earlier this week, was launched on Thursday and is now moored at a pier, state-run news agency KCNA said.

Satellite images and videos show how launching a 5,000-ton warship into the water sideways can cause it to capsize if done incorrectly.

North Korea has arrested four people it claims bear responsibility for a launch accident last week that left leader Kim Jong Un’s newest warship lying on its side and partially submerged in a shipyard,