Nashville tornadoes: at least 19 people killed and hundreds homeless
Schools and airport damaged as police search for injured people in Nashville
At least two tornadoes have hit central Tennessee, including one that ripped across downtown Nashville and caused about 40 buildings to collapse around the city, police said as they searched for injured people.
Authorities pleaded with people to stay indoors, at least until daybreak on Tuesday could reveal the dangers of a landscape littered with blown-down walls and roofs, snapped power lines and broken trees. Some schools already closed for Super Tuesday voting in the presidential primaries will be kept closed for another week to handle repairs.