At least 20 people have been killed after an earthquake struck Pakistan's Balochistan province early on Thursday, reported the BBC quoting the officials.
Disaster management officials said the death toll may increase.
Images on social media showed people in the city of Quetta out on the streets in the aftermath of the quake.
Initial reports indicated that it may have measured up to 5.7 on the Richter scale. A government official said people died when structures collapsed.
Local officials told BBC Urdu that at least 150 others are thought to have been injured, with several of them rushed to hospital in critical condition.
Rescue operations are still underway.
Many of the dead were women and children, according to the Reuters news agency.
Much of the damage appears to have affected the Harnai district, officials said.
Harnai, which is located east of the provincial capital Quetta, has a large number of coal mines.
Balochistan's interior minister Mir Ziaullah Langu told the BBC that emergency services had been dispatched to the area.
