Protesters rally in Charlotte over shooting of Keith Lamont Scott

One person 'critically injured' as clashes erupt for second night

North Carolina governor declares state of emergency

Accounts differ over shooting of Keith Lamont Scott

At least one protester has been critically injured as clashes with police erupted for a second night in the city of Charlotte amid escalating tensions over the fatal police shooting of a black man in North Carolina.

Pat McCrory, the North Carolina governor, declared a state of emergency and said the National Guard and state highway patrol troopers would be deployed.

The latest trouble began with a peaceful rally that turned violent after several hundred chanting demonstrators marched through downtown with brief stops at a black church, police headquarters and a large entertainment venue called the EpiCentre.