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National Weather Service

Officials: EF1 tornado tore part of Oklahoma casino roof off

An overnight batch of severe storms spawned an EF1 tornado that tore part of a casino roof off in central Oklahoma during a concert and downed power lines and trees throughout the state, emergency managers said Sunday.

The twister touched down in Cleveland County, one of several counties where National Weather Service officials were surveying damage after reports of as many as four tornadoes late Saturday. No injuries were reported.

Part of the Riverwind Casino's roof was ripped off in Norman during a Beach Boys concert Saturday. Oklahoma Gov. Mary Fallin, who was among those attending the show, told KWTV that there was "this huge flood of rain coming through the...