Gov. Tim Pawlenty called for security upgrades at the state treatment center in St. Peter, Minn., where four men escaped over the weekend.

Pawlenty told WDAY-AM in Fargo, N.D., that razor wire should be placed around the entire perimeter of the hospital, where convicted rapist Michael Benson and three other men escaped.
``They were designed as hospitals, but they have to be secure,'' Pawlenty said Wednesday.

Benson remained at large on Thursday. The other three men were quickly recaptured.

Authorities have said Benson, 42, stole a car near St. Peter. His last credible sighting was Monday afternoon near Cass Lake.

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