At least 21 people were killed overnight in Kentucky and Missouri when a volatile weather system spawned tornadoes as it ripped across a large swath of the U.S. Midwest and Great Lakes, officials said on Saturday.

St. Louis – Storm systems sweeping across the Midwest have left at least 21 dead, including nine people killed after a tornado sparked what authorities called a mass casualty event in southeastern Kentucky.

Storms in parts of the Midwest and South left at least 21 dead, including nine people killed after what appeared to be a devastating tornado in southeast Kentucky.