RENSSELAER — Three people have been killed, including a child, in an early morning house fire in upstate New York.

The Albany Times Union reports the blaze began early Sunday at a home in Rensselaer.

Police have not yet released the names of the victims, but reports say they were a mother, a grandmother and a young son.

The newspaper says a daughter is hospitalized in critical condition and another child was able to escape to a neighbor's house for help.

Authorities say it took firefighters less than an hour to bring the fire under control. The house was completely gutted.

The cause of the fire is unknown.