SAN ANTONIO (AP) - Authorities say a fire at a San Antonio group home for the mentally disabled has left three people dead and one hurt.

Arson investigators were at the scene Thursday in an attempt to determine what started the fire. Officials say the lone survivor was hospitalized in critical condition.

Fire department Assistant Chief Robert Mikel says a neighbor called 911 late Wednesday night to report the blaze. Mikel says 13 men live in the house and authorities have accounted for all of the other residents.