Around 400 people have marched from link to RAF Waddington against a new fleet of armed drones being based in the UK for the first time.
The drones, which were previously operated from a United States Air Force base in Nevada, are used to support ground troops in Afghanistan.
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A gunman who held two members of staff hostage at a bowling alley in Nuneaton has been arrested.
There are reports of flash-bangs being used at Bermuda Park as ambulances arrive at the scene.
Chris Turner, an eyewitness to the incident at Bermuda Park, said a man was carrying a shotgun and told him to "get out of the way".