Three other children in the van will be OK, police said. The kids' mother was initially detained, then released from custody.

The deaths remain under investigation, though authorities believe the 2-year-old and 9-year-old froze to death early Monday.

Two children who were apparently living in a minivan in the Hollywood Casino at Greektown parking deck were pronounced dead at a nearby hospital after police say they apparently froze to death.

According to police, the family was living in the van and pulled into the casino around 1 a.m. Buyout blocked: Judge extends pause on Trump federal worker plan Most extravagant royal palaces: King Charles' London home,