From KUSA:
ARVADA – Fire crews have contained a fire at a home Tuesday morning, but they are still trying to determine whether someone was inside.
"At this point, we do not know what has caused the fire," said Scott Pribble, spokesman for the Aurora Fire Protection District.
Arvada Fire says it received a 911 call at about 4:40 a.m. reporting a fire at 5240 Dover Street. Crews arrived on scene within seven minutes to find the front end of the house fully involved flames.
"We tried to make an initial attack inside, were pushed back by heat and smoke and just not able to move inside the home," said Pribble. "So, we did pull back out and fought the fire from the outside of the house."
The neighbors on either side of the burning home had to be evacuated.
"It was a heck of a way to wake up in the morning, you know," said next-door neighbor Jerry Merseal. "They banged on the door, I jumped up, grabbed the wife and woke her up and got my kid up and we ran out of the house with our dogs."
Merseal says once he evacuated his home he turned and saw the fire next door to his home and he could feel the heat from the blaze.
"Oh, big ball of fire," said Merseal, "It was so bright and intense that you couldn't see anything else. It looked like you were standing next to the sun, it was so hot."
Merseal says authorities had his family go down the street where they were out of harm's way.
Fire crews were able to contain the fire in less than an hour, but have yet to enter the home because of the extensive damage: The floor was burned in some areas, making it unsafe to enter. Crews also continue to extinguish hotspots.
Pribble says fire crews think they saw someone inside, but still have not confirmed it.
"We're still trying to find out if what we think we see is the person that was inside or not," said Pribble. "We don't know for sure at this time yet."
Fire investigators will enter the home once they determine it is safe enough. At that time, they will begin to investigate the cause of the fire.