JANESVILLE, Wis. (AP) -- Law enforcement officials searching for a Wisconsin man suspected of stealing a large number of firearms and threatening an attack are getting more help from federal investigators as they follow hundreds of leads in search of the man.

The Rock County Sheriff's Office said Monday "additional federal resources have been brought in" from around the country to search for Joseph Jakubowski but provided few details. Authorities suspect the 32-year-old of stealing handguns and rifles from a Janesville store April 4 and making threats to schools and public officials.

The sheriff's office says Jakubowski expressed anti-religious views in the 161-page manifesto that he apparently sent to the White House.