North Carolina State Governor Pat McCrory declared a state of emergency in the city of Charlotte and ordered the deployment of the National Guard and traffic police as reinforcements for the local police.
US Authorities have declared emergency as protests against the police continued after a African-American man was shot dead.
A person who was earlier declared dead from the impact of bullets during racial protests in the city was on life support and in critical condition.
Clashes between dozens of demonstrators and the police continued.