EDMOND, Okla. -- Edmond Police are investigating after they say a meth lab exploded.
It happened Monday night at a campsite on the west side of Arcadia Lake.
The explosion blew the back off of the RV, leaving the people inside with life-threatening burns.
Carl Braun who was staying close by said, "She opened the door to get out of there screaming."
Those screams along with a lot of smoke came from an RV near his Monday night.
Police said inside a meth lab that had exploded.
Edmond Police's Jenny Monroe said, "The suspects in this case threw the meth lab out into the woods and so it took our officers about eight hours to clean up the campsite."
Shristina Leigh Martin, 36, and 43-year-old Owen Lee Dandridge both suffered severe burns.
They were taken to a metro burn center.
Police said this is not common in Edmond.
In fact, in the past 10 years there have been less than five meth labs in the Edmond area.
Monroe said, "Because of the technique used now they are mobile and so they're harder to find."
Braun and his family have been staying at the Scissortail Campground since Saturday.
He said the RV where the explosion happened had been parked there the whole time but it wasn't until Monday night that he saw anyone go inside.
Not long after the person arrived, Braun said the explosion took place, blowing out windows and the back of the camper.
Braun said, "There were two explosions and it was quite muffled and we saw smoke coming out of the back of the mobile home."
Edmond Police routinely patrol the campsites around Arcadia; however, they do not check the individual RVs unless suspicious activity has been reported.
Both people were still in a metro hospital Tuesday night.