A dozen people were still missing on Thursday after a 6.2-magnitude earthquake struck northwestern Gansu province late Monday and netizens questioned the speed at which rescue operations ended. Chinese media reported that search and rescue work in Gansu ended at 3 p.m. (0700 GMT) on Tuesday, about 15 hours after the disaster hit a remote and mountainous area near the border straddling Gansu and Qinghai provinces. It was not immediately clear whether the search in Qinghai was continuing.