Mr Amshar said all other members of staff are safe and the customers who were inside the bowling alley have left safely. I said: "We're halfway through a game" then he said: "There's a gunman".
"He said, "there's a gunman".
"I sort of thought it was a fire alarm or something". I just tried to keep her occupied and said we would be going home soon.
"He approached us. He was walking at the top end of the bowling lanes".
"As soon as we spotted him, we just ran". They did not disclose his age or what he had been arrested for.
He tweeted: "Madness up Nuneaton bowling man got 2 hostages & a shotgun just seen him walk a hostage to the door with the shotgun to his head #Chaos". "That is what I know, I can't confirm that for definite".
"I ran, got my things as quickly as I could and get out of there".
Bangs and flashes have been reported at the scene, with Sky's Joe Tidy saying around 15 armed officers have been seen running towards the bowling alley.
Police cars at the scene in central England.
Citing an eyewitness from a nearby restaurant, Sky News says the shopping center is on lockdown.
At Bermuda Adventure, witness Megan Westwood said visitors were initially told there was a man with a knife.
"The police, we had to give the police our vehicle keys and give them so we could go out by the back door".
She added: "Everyone is a little bit scared at the minute".
The two workers held for roughly four hours were released unharmed, police and ambulance officials said.
The Warwickshire Police department said on Twitter that its officers were dealing Sunday afternoon with an "ongoing incident" in Nuneaton, near the city of Birmingham.
"We are pleased that we were able to bring this incident to a peaceful resolution and that there were no injuries", he said.
"I would like to reassure the Nuneaton community that the incident is unconnected to any terrorist activity".
Lloyd Weightman told the Coventry Telegraph he was with his two sons, aged seven and three, when he came out of the changing room to find the bowling alley empty apart from the gunman.
"There were probably about 20 kids crying that were trying to get out".
The leisure park where a gunman is holding hostages inside a bowling alley.
He said that police descended on the Odeon Cinema, toddlers soft play area and nearby Nuffield gym.
"There are quite a few bullet proof vans", he said. An AFP photographer saw an ambulance being driven away under police guard.
A British leisure park was in lockdown on Sunday with witnesses telling United Kingdom media a gunman had taken hostages at a bowling alley.