A West Valley mother and her infant daughter were in critical condition Friday at University Hospital's Intermountain Burn Unit with burns suffered in a fire that started in a dried-out Christmas tree.

Angelyn Rasmussen, 29, was suffering from severe smoke inhalation and Ann Rasmussen, 17 months, suffered second-degree burns over 11 percent of her body in the Thursday morning fire, officials said.Two other children, one age 5 and the other 2 months, were treated at Pioneer Valley Hospital for smoke inhalation and later discharged.

"The fire started in the front room from the Christmas tree," said Deputy Fire Chief John Williams.

The exact cause of the fire was still undetermined.