LHASA -- A total of 1,211 aftershocks had been detected as of 3 pm Thursday after a 6.8-magnitude earthquake jolted Dingri county in Southwest China's Xizang autonomous region on Tuesday, local authorities said.

The largest aftershock had a magnitude of 4.4, and occurred about 18 kilometers from the epicenter of the 6.8-magnitude earthquake, according to the regional earthquake bureau. The bureau also noted that 33 of the aftershocks had a magnitude of over 3.

The 6.8-magnitude earthquake struck Dingri county in the city of Shigatse at 9:05 am on Tuesday, leaving 126 people dead and 188 others injured. A total of 407 trapped individuals have been rescued.