Missouri tornado filmed by storm chasers

At least 116 people have been killed after a tornado tore through the city of Joplin in the US state of Missouri, officials have said.

The tornado cut a path nearly six miles (10km) long through the city centre, destroying businesses and homes.

Missouri Governor Jay Nixon has declared a state of emergency and warned more storms are on the way.

A team of storm chasers filmed the tornado as it hit the city.

Video footage courtesy of TornadoVideos.net Base Hunters