Teachers lead children away from Briarwood Elementary School after a massive tornado destroyed the building in Oklahoma City on Monday. The death toll continues to climb as rescuers search for survivors.
A fire official drives through the rubble of Moore medical centre.
At least 51 victims have been confirmed dead but rescuers, working though the night to sift through the debris, estimate another 40 bodies remain to be found.
The half-mile-wide tornado hit the Oklahoma City suburb of Moore in the US Midwest with winds of 200 mph. It smashed its way across the community of 41,000 for 45 minutes Homes were crushed into piles of broken wood. Cars and trucks were left crumpled on the roadside.
More than 120 people were being treated at hospitals, including about 50 children.
President Barack Obama declared a major disaster and ordered federal aid to supplement state and local recovery efforts.