CHICAGO – Hoping to address the flow of guns across state lines, Cook County Sherriff Tom Dart plans to host a gun summit in Indiana later this week, his spokesman told The Associated Press on Sunday.

Law enforcement authorities in both states were invited late last week to "a productive and long overdue discussion on this issue that is critically important to our states and our communities," according to the letter from Dart.

The event will be held Friday at the public safety facility in Gary, Ind., Dart spokesman Frank Bilecki said. Those invited include Chicago Mayor Rahm Emanuel, Chicago Police Superintendent Garry McCarthy, Gary Police Chief Wade Ingram and Lake County (Ind.) Sheriff John Buncich.