Three people, including a suspected gunman, have been killed in a shooting incident at a swimming pool in Spalding, Lincolnshire, according to the UK police.

“We can confirm that there has been a firearms incident on Pinchbeck Road in Spalding in the vicinity of the Castle Swimming Pool, in which three people have been fatally wounded, including the suspected offender,” a Lincolnshire Police spokesman said Tuesday.

"There is an ongoing police investigation and at this stage we are not looking for anyone else in connection with the incident," the spokesman added.

“There is no indication that this is a terrorist-related incident and no shots have been fired by police. We would urge members of the public to stay away from the area at the present time.”

Those killed are believed to be two women and a man. Police are investigating the case and there is no indication of a terror attack, the spokesman added while advising people to steer clear of the shooting site at Castle Sports Complex.

Emergency services, including an air ambulance and paramedics, were present at the scene. It was not clear if anybody else was hurt in the shooting.

“Our ambulance crews and paramedic officer were sent to the emergency and told to approach with caution,” said an ambulance spokesperson said.

“Upon arriving at the scene our paramedics treated three patients who had gunshot wounds. Despite the best efforts of everyone at the scene the patients were pronounced dead. This is a tragic incident and our thoughts are with the friends and families of those involved.”