Three people killed and three hospitalized as Michigan town hit by tornado

Roofs torn off and trees knocked down in Union City as more than 7m Americans at risk of severe weather

Three people have been killed and three were taken to a hospital after a tornado hit a southern Michigan town on Friday, authorities said.

Powerful storms ripped across the state, tearing the roof off a home improvement store, sending parts of a storage building flying and knocking down trees as warnings were issued across the southern part of the state.