Tornado devastation in US Mid-West
Tornadoes sweeping the US Mid-West have struck near Oklahoma City, leaving at least seven dead and hitting vehicles on a section of motorway west of the Oklahoma state capital.
The new storms come as rescue workers search for hundreds of people missing in Joplin, Missouri, about 200 miles (320km) to the north-east.
At least 122 people were killed there on Sunday by a powerful tornado that cut a wide swathe through the city.
Daniel Griffiths reports.
25 May 2011