DUBUQUE, Iowa -

Police have arrested a 34-year-old Dubuque man charged in Wisconsin with attempted murder and battery in the assault of another Dubuque man there three years ago.

The Crawford County Sheriff's Department in southwestern Wisconsin says it is has been investigating the July 2013 assault of 30-year-old Joshua Milligan with the Iowa Division of Criminal Investigation.

The sheriff's office says the assault happened at a concert in Bridgeport, Wisconsin, where Milligan was found unconscious with head injuries. Investigators believe Anthony Runde attended the concert with Milligan and hit him in the head.

Authorities say Runde was arrested Tuesday in Dubuque, days after he was indicted by a Crawford County grand jury.

Runde remained jailed Wednesday in Iowa await extradition to Wisconsin and could not be reached for comment.