A 32-year-old man is being assessed in a secure mental health unit after a police officer and three men were stabbed at a mosque in Birmingham.
He was arrested in Washwood Heath after turning on worshippers during evening prayers on Saturday.
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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".