Four people had been killed and 23 others remained missing as of 11 p.m. Saturday after a flash flood and mudslide struck the city of Kangding in southwest China's Sichuan Province, local authorities said on Sunday.

The disaster took place at about 3:30 a.m. Saturday in Kangding, the Tibetan Autonomous Prefecture of Garze, toppling a tunnel bridge and destroying homes in Ridi Village. Local authorities have organized a full-scale rescue operation after the disaster, with 1,448 rescuers deployed so far. The relocation and resettlement of 939 affected residents have been completed.