The earthquake hit Jiuzhaigou county, a popular tourist destition, at 9.19 p.m. on Tuesday at a depth of 20 km, Xinhua news agency cited Chi Earthquake Networks Centre as saying. A separate 6.6-magnitude tremor struck Xinjiang province on Wednesday, injuring 32 people. Rescue workers were assisting stranded tourists at Jiuzhaigou and more than 45,000 tourists were evacuated. Over 800 workers were combing villages in search of anyone still trapped, authorities said. Chi’s Earthquake Administration (CEA) said more than 1,000 aftershocks had been detected, with the most powerful reaching 4.8 magnitude on Wednesday, BBC reported. The tiol Disaster Reduction Centre of Chi estimated that at least 24,000 homes were destroyed or seriously damaged in the Tuesday quake.