Three are still in the hospital with life-threatening injuries after a house explosion around 8:30a.m. Tuesday morning. The home in Dobbin, 20 miles northwest of Conroe, injured an infant and two adult women.

In a statement, the Montgomery County Fire Marshal's Office says the explosion early this morning destroyed the house in Dobbin.

Officials say the 8-month-old baby was airlifted to the University of Texas Medical Branch at Galveston with severe burns and other injuries, where the baby remains. The child's 58-year-old grandmother and 65-year-old aunt were airlifted and remain at Memorial Hermann Hospital in Houston with burns and injuries.

The cause of the blast remains undetermined, but fire marshal's investigators suspect a buildup of flammable gases in or around the home led to the explosion. The blast was felt up to 20 miles away.

Dobbin is about 50 miles northwest of Houston and has about 300 residents.