North Korea's ground test of rocket engine is 'a success'

Kim Jong-un reportedly supervised the ground test

North Korea has carried out a "successful" ground test of a new rocket engine to launch satellites, state media says.

Kim Jong-un, the country's leader, asked scientists and engineers to make preparations for a satellite launch as soon as possible, KCNA reported. It is the latest in a series of missile-related tests this year.

Chinese Premier Li Keqiang and US President Barack Obama met in New York on the sidelines of the UN General Assembly

Meanwhile, the US and China have agreed to step up co-operation at the UN to address the North's fifth nuclear test. The underground nuclear test, conducted earlier this month, is thought to be the country's most powerful yet.

North Korea regularly makes claims about the progress of its nuclear and missile programmes, but analysts say most of them are impossible to independently verify.

• North Korea's missile programme
• Kim Jong-un: North Korea's supreme commander

US and Chinese officials have started discussions on a possible UN sanctions resolution as a response, unnamed diplomats were quoted by the Reuters news agency as saying.

But Beijing has not said directly whether it will support tougher steps against Pyongyang, the agency added.