A government minister says more than 100 people have been killed in an earthquake in southwestern Pakistan.

Minister for Revenue and Rehabilitation Zamaruk Khan says the government is preparing to provide food, shelter and medical care to survivors of Wednesday's quake.

He says "more than 100" people have been killed so far.

The quake struck two hours before dawn in the impoverished province of Baluchistan.

The US Geological Survey reports that the quake had a preliminary magnitude of 6.4 and was a shallow 10 miles (15 kilometers) below the surface.