ILLINOIS ? A man arrested on an outstanding warrant was being questioned Friday in Wisconsin in the deaths of two men and two women whose bodies were found in an upscale suburban Chicago home.

State police and FBI officials stopped the 28-year-old man near Portage, Wis., on Friday, said Columbia County, Wis., Sheriff Steven Rowe.

Rowe later issued a news release saying the man was arrested on an outstanding warrant from Illinois, but he did not provide further details. He said the man is from Naperville, Ill., near the house where the bodies were found.

Police in Aurora, about 30 miles west of Chicago, found the bodies Thursday in a two-story brick house. Authorities had gone there to check on the residents after they didn’t show up for work.