A MAN has died and several people were injured as tornadoes caused havoc in the US state of Oklahoma.

The body of a 79-year-old man was found in an open area of a neighbourhood near the town of Shawnee, where a mobile home park was severely damaged by a tornado.

Homes in a trailer park were turned into splinters and rubble, sending residents running for shelter.

At least four tornadoes swept through Oklahoma, while Kansas and Iowa were also hit hard by a massive storm system that stretched from Texas to Minnesota.

At least four tornadoes touched down in Oklahoma.

A storm spotter told the National Weather Service the tornado left the earth scoured at the mobile home park.

Dozens of homes were damaged by the other tornados that touched down in Oklahoma, but emergency officials had no immediate reports of injuries.

In Wichita, Kansas, a tornado knocked out power to thousands of homes and businesses but bypassed the most populated areas of the state's biggest city.

Pottawatomie County Sheriff Mike Booth said six people who lived in the mobile home park outside Oklahoma City were injured.