An explosion and fire at a MarkWest energy facility in Washington County has left several people with injuries.
KDKA-TV reports that four employees with burns were airlifted from Washington to hospitals in Pittsburgh on Thursday night.
UPMC Mercy told the station that two people were taken there. It said one is in good condition and the other is critical.
On its website, MarkWest says it "is engaged in the gathering, processing, and transportation of natural gas."
MarkWest says in a statement that the incident happened "near two temporary tanks" that resulted in a fire.
KDKA reports that the fire is now out
The cause of the fire is under investigation.
