Drone footage shows collapsed Illinois warehouse after tornadoes sweep US – video

An Amazon warehouse near Edwardsville, Illinois, about 25 miles (40km) north-east of St Louis, was destroyed in extreme weather conditions on Friday night. It wasn't immediately clear how many people were hurt by the roof collapse, but emergency services called it a 'mass casualty incident' on Facebook. One official told KTVI-TV that as many as 100 people may have been in the building, working the night shift, at the time of the collapse.

Up to 100 people are feared to have been killed after a devastating outbreak of tornadoes ripped through Kentucky and other US states on Friday night and early Saturday morning

• Up to 100 feared dead after tornadoes tear through US states