Little Rock: Thirteen people have reportedly been killed and dozens injured as tornadoes and fierce thunderstorms swept through areas of the south of the causing widespread damage.

As many as eight counties were hit by multiple tornadoes with Arkansas emergency services reported seven dead in
four counties.

Six more died in Tennessee , according to the Nashville Tennessean newspaper, and more than two dozen others were injured, some critically.

At least four polling stations in western Tennessee, where voting in the state's presidential primaries was underway, were forced to close early due to multiple tonadoes that struck the town.

Arkansas Gov. Mike Beebe, in telephone interview from emergency operations centre in North Little Rock , said "It's pretty rough night in the scope of it. I don't know if I can remember when we've had as many (tornado) warnings and (tornado) touchdowns."

Widespread damage in Tennessee included part of a shopping mall in Memphis and a dormitory at Union University in Jackson, Tennessee, where some students were trapped for a time but not seriously injured, the website of the Memphis Commercial Appeal newspaper reported.