Bridgeville (Pennsylvania, US), Aug.5 (ANI): At least five people were killed after a gunman opened fire on a dance class in a gym here on Tuesday.

Local television station WTAE reported four people being killed - the gunman and three others - in the shooting at a Latin dance class. But CNN television said five have been confirmed dead after the attack on the LA Fitness Gym in Bridgeville, near Pittsburgh.

Emergency services told WTAE up to 15 people might have been hit.

One hospital representative told the channel that five women are being treated for multiple gunshots and are in a critical condition.

The killer walked into an all-female dance class carrying a bag, turned off the lights, and opened fire from at least one firearm, a witness said in an interview with WTAE.

Sky News quoted a witness named Nicole, as saying: "People everywhere were screaming. It was horrible."

Nicole said about 30 women were in the dance room at the time but WTAE's reporter said in total there have been closer to 100.

Ambulances and police cars have flooded into the area, which is part of a shopping center.

The number of casualties or the status of the gunman has yet to be confirmed. (ANI)