NEW HAVEN — A 17-month-old girl was in “extremely critical condition” after an overdose Saturday afternoon, according to police.

Capt. Anthony Duff said police responded to a Norton Street residence around 12:40 p.m. Saturday on reports of a child who had ingested adult medication.

The child was rushed to Yale New Haven Children’s Hospital where she was being treated in the pediatric intensive care unit.

The New Haven Police Department Special Victims Unit is investigating the overdose. A Department of Children and Families investigator also is involved.

The investigation is ongoing. Anyone with additional information is asked to contact detectives at 203-946-6304.