Footage released by the Grimsby Telegraph shows the aftermath of the arson attack on he Grimsby Islamic Cultural Centre last night.
The centre was targeted while police officers were guarding it, following an incident last week when bricks were thrown through its windows.
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Doug Bergeson, from Wisconsin, USA, calmly drove himself to hospital and walked into the emergency room to ask for help.
The venue will open its doors again for the first time since May's bombing on September 9 for the We Are Manchester concert .
Reports peaked in June, when the London Bridge and Finsbury Park attacks took place, with the service receiving 5,703 calls.