The USGS initially measured the quake at 5.7 magnitude, but revised it to 5.9 a few hours later. It also revised the depth from 20.8 kilometers (12.9 miles) to 9 kilometers (5.6 miles).
Some houses have collapsed in Harnai following the quake, according to the Balochistan Levies Force, the paramilitary law enforcement group in the province.
Sohail Afridi, the district commissioner of Harnai, confirmed the children’s deaths amid ongoing rescue efforts.
“Since 3 a.m. the rescue operation has been underway. The injured have been taken to the hospital via helicopter,” Afridi said, adding the situation is “currently under control.”
Harnai is located in a rural area and not easily accessible, welfare organization Edhi Foundation told CNN.