A sinkhole swallows a bus and several pedestrians on a busy street in Xining, China, killing six people and leaving 16 others injured. According to state media, the sinkhole stretches nearly 10m (32 feet) in diameter.
North Korea accuses South Korea of kidnapping its citizens and demands their immediate return after Seoul's Ministry of Unification said 13 of them had defected to South Korea from China, where they worked in a Pyongyang-operated restaurant. China says that the 13 people, a male manager and 12 young female employees, had legitimate passports and had freely exited China.
China says it will "not stand for violations of its territorial waters in the name of freedom of navigation", following a statement from a Pentagon official, that the U.S. may consider sailing warships close to China's disputed artificial islands in the South China Sea within the next two weeks.
An international team of scientists announce the discovery in China of a new meat-eating Theropod dinosaur, "Aorun zhaoi", dating from 161 million years ago. It is the oldest Coelurosaur known to date.