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Film Tornado oil workers in North Dakota

May 27 2014 Last updated at 15:45 BST clock

A group of oil workers have escaped a few times, tornado hit before his camp in North Dakota, USA.

At least 15 followers damaged or destroyed south of Watford City on Monday were, with a 15-year-old girl with serious injuries.

Continue to seek emergency personnel in the camp, the debris.

Dan Yorgason captured these images on the run.