A suspected gunman apparently shot himself after a 16-hour stand-off with police, according to an eyewitness.
A single gunshot was heard at about midday at the centre of a police operation on Leagrave Common, in Luton, Bedfordshire.
One eyewitness said a man, who appeared to have been holding a sawn-off shotgun to his head, could be seen lying on the floor.
He said: “There was a gunshot. The man is now lying on the ground. He is surrounded by armed police and paramedics.”
The stand-off was sparked at about 8.30pm last night when the man was challenged by armed police who suspected he was carrying a gun.
Armed officers surrounded the man and trained negotiators were brought in as police shut down the large open space.
Earlier, the eyewitness said the man was sitting cross-legged on a football pitch close to a set of goalposts.
He said the man was holding an object that looked like a sawn-off shotgun to his chin with the butt of the gun in his lap.
The dead man was described as aged in his late-30s or early-40s, wearing dark clothing. He was sitting next to a brown paper McDonald’s bag.
A police cordon remains in place around the park between Sundon Park Road and Henge Way.