The people of Hattiesburg, Miss., are working to assess the damage after a tornado tore through the city on Sunday.

It was part of a wave of severe storms that downed trees, damaged buildings and injured more than a dozen people.

The tornado may have been a half-mile wide and on the ground for at least 60 miles.

The twister traveled down one of Hattiesburg's main streets and mangled homes, commercial buildings and structures on the campus of the University of Southern Mississippi. Emergency officials say some 60 people were treated for injuries but there were no fatalities.

A Mississippi Emergency Management Agency spokesman says it appears that a single tornado caused the damage in those two counties and Lamar County. Hundreds of homes are damaged in Forrest County, along with a couple dozen in the other two.

On the campus of the university, trees were snapped in half around the heavily damaged Alumni House where part of the roof was ripped away. The university says no one was hurt but that it was under a state of emergency, anyone away from campus should stay away until further notice.

(Copyright 2013 by The Associated Press.  All Rights Reserved.)