As many as five people have been killed after a gunman opened fire on a dance class in a US gym, according to reports.
Local television station WTAE has reported four people have been killed - the gunman and three others - in the shooting at a Latin dance class.
But CNN television has 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 may have been hit.
