QUETTA, Pakistan, October 7 (Reuters) -At least 20 people were killed and about 300 injured today when a 5.7 magnitude earthquake struck southern Pakistan in the early hours as many of the victims were asleep, the Disaster Management Authority said.
Rescue workers said most of those killed were women and children.
The earthquake struck at the relatively shallow depth of 20 km (12 miles) with an epicentre 102 km (62 miles) east of the city of Quetta, the U.S. Geological Survey (USGS) said.
More than 100 mud houses collapsed and many buildings were damaged. Television footage showed buildings with gaping cracks, caved in roofs and crumpled walls.
“About 13 people from Harnai have been martyred and hundreds of are injured,” one resident said.
Social media showed houses shaking and light fittings swaying as the quake struck. Stunned residents later gathered in the streets in the dark. CCTV footage aired on Geo television showed transport trucks shaking.
As rescuers searched through the rubble, some of the injured were treated on stretchers in the street under telephone torch light.
An army helicopter was airlifted at least nine of the seriously injured to Quetta, the state-run Associated Press Pakistan reported.
Aftershocks were being felt across the region.
Pakistan sits on top of colliding tectonic plates and earthquakes are common.
In 2006, some 73,000 people were killed by a 7.6 magnitude quake that struck about 95 km (60 miles) northeast of the capital, Islamabad.