A gas explosion at a coal mine in northern China has killed 90 people, according to state media, the country’s deadliest mining disaster in more than a decade.

China is preparing to launch its next crew to the Tiangong space station as soon as Sunday (May 24), in a mission that will relieve astronauts who have been in orbit a month longer than planned, and potentially send one astronaut on China's first year-long spaceflight.