(CNN) -- A shooting at an LA Fitness gym outside Pittsburgh, Pennsylvania, left at least four people dead and several others wounded Tuesday, police said.
Authorities at the scene of a shooting at an LA Fitness gym near Pittsburgh, Pennsylvania.
"We have four confirmed deceased," said Charles Moffatt, Allegheny County Police Superintendent. "We have at least 10 wounded in various hospitals throughout the area."
The shooter, whose name was not immediately released, was among the fatalities, said Gary Vituccio, manager of Collier township.
The shooting victims arrived at the three major hospitals in the area.
A spokeswoman for Mercy Hospital confirmed five female shooting victims arrived at the facility with multiple gunshot wounds. Three were in serious condition and two were listed as critical, she said.
Allegheny General Hospital received two more victims at its trauma center, a spokesman said. Both were women and were listed in fair condition, he said.
A St. Clair Hospital spokesman said three shooting victims arrived there Tuesday night; two were in stable condition and one patient, who was shot in the chest, died at about 8:55 p.m.
Perry Calabro of nearby Bridgeville told CNN he was between racquetball games at the gym when he suddenly heard screaming and multiple gunshots. He said he ran out and didn't see the gunman or others.
Other witnesses told CNN affiliate WTAE that the lights went out before they saw flashes in dark -- what they later realized was gunfire.
Witnesses told WTAE that a man unrecognized by the gym's staff shot people in a Latin dance class.
A witness identified as Nicole told WTAE that about 30 women were in the class when "a middle-aged white male walked into the class. He had a big gym bag."
"He looked out of place in a class full of women," according to the witness, who told WTAE the man put down the bag, turned off the lights and opened fire.