At least 20 people have died after an earthquake struck northern Afghanistan, local authorities say, with the toll expected to rise as rescue efforts continue.

Hundreds have also been left injured, local officials told the BBC.

The earthquake struck near Mazar-e-Sharif, one of the country's largest cities that is home to about 500,000 people, at around 01:00 local time on Monday, (20:30 GMT on Sunday).

It had a magnitude of 6.3 and a depth of 28km (17 miles), according to the US Geological Survey, and was marked at the orange alert level, which indicates "significant casualties" are likely.

More than 530 people have been injured, according to the Taliban government health ministry.

Provincial officials earlier told the BBC that casualties were likely to rise as rescue efforts continued.