Honolulu police are investigating "suspicious injuries" an 18-month old baby boy suffered.
Officials say on Wednesday, the infant's father took him to a home "daycare" in Honolulu.
A few hours later, the baby sitter found him unconscious.
Paramedics were called and rushed the child to the hospital in critical condition.
On Friday, a physician found his injuries to be suspicious and contacted police.
Police say no arrests have been made.