JANESVILLE, Wis. - Officials have closed several schools in southern Wisconsin as police search for a man suspected of stealing numerous guns and threatening to use them against public officials or a school.

Rock County Sheriff Robert Spoden said Friday that the suspect, 32-year-old Joseph Jakubowski, also sent an anti-government manifesto to the White House.

Police allege Jakubowski stole a large quantity of handguns and rifles from a gun shop Tuesday in Janesville, about 70 miles southwest of Milwaukee. Investigators found a burned vehicle registered to him nearby.

Public schools in Janesville and Milton canceled classes Friday as officers combed the area. The University of Wisconsin-Rock County and Blackhawk Technical College were also closed.

Authorities allege Jakubowski had threatened to steal weapons and use them against public officials or at an unspecified school.