A man has died and another was seriously injured in an early morning house fire in Kennebunk. The fire was reported at about 2:30 a.m. at 305 Cat Mousam Road, according to the State Fire Marshal’s Office. The injured man is being treated at Maine Medical Center in Portland. A third man escaped the fire unharmed, the fire marshal’s office said. A team of investigators is working to pinpoint the cause of the fire. This story will be updated.