An arrest warrant was issued Monday for a 52-year-old convicted child sex offender after police discovered that the Vernon Hills man was living with two women who run a day-care center out of their home.

Michael D. Lintz, of the 0 to 100 block of Montebello Drive, faces felony charges for residing in a location where persons under the age of 18 are present, according to Matthew Chancey, chief of felony review for the Lake County state's attorney's office.

Under state law, he said, convicted sex offenders must never knowingly be in the unsupervised presence of people younger than 18.

Lintz was convicted in Lake County in 1991 of aggravated sexual abuse and sentenced to a 6-year prison term, according to the Illinois Department of Corrections.

After he was paroled in 1994, Lintz was required to register with local police as a child sex offender, which he did in Vernon Hills.

Information about Lintz is on record at the Vernon Hills Police Department and on the Lake County Sheriff's Department's child sex offender Internet site.

Chancey said that an alert individual, whom he declined to identify, noticed that Lintz's listed address matched the address listed in a local newspaper ad for a day-care center.

The women who run the center, Sharon L. Hahn, 60, and her 30-year-old daughter, Lauren E. Hahn, also were named in the warrant for permitting Lintz, who authorities said they knew was a convicted sex offender, to be in the presence of people younger than 18.