DOBBIN, Texas -

The Montgomery County Fire Marshal says that a second person that was injured in a house explosion has died.

Lean Mock passed away Saturday afternoon as a result of burn injuries she suffered during last week's house explosion in Dobbin.

Mock's sister, Jennifer Mock, also died as a result of her injuries.

The Montgomery County Fire Marshal said that baby Wyatt is continuing to improve.

Family members say the explosion on Tuesday happened when the propane-fueled stove was turned on.

The cause of the blast is still under investigation.