Severe weather warnings in the US Midwest
A severe storm threatens to bring tornadoes to many parts of the Midwestern US, forecasters are warning.
Parts of Illinois, Iowa, Kansas, Missouri, and Nebraska have all been put on alert with tornado experts saying storms on Saturday could be a "life-threatening event".
On Friday a first tornado swept into Norman, Oklahoma, site of the US national Storm Prediction Center (SPC). No serious injuries were reported.
Wendy Urquhart reports.