A home explosion in Fort Bend County has injured three people.

The Fort Bend County Fire Marshal says it happened around 9:30pm Friday night at a home near West Davis and Davis Street.  A 75-year-old woman, her daughter, and her daughter's boyfriend were injured in the blast.  The elderly woman was flown to the hospital in serious condition with burns over 40% of her body.

Police say the daughter and the boyfriend were transported in stable condition with burn injuries as well.

So far investigators do not know what caused the explosion.