A man dressed as Batman has walked into a police station and handed over a wanted man to officers.
West Yorkshire Police said they do not know the identity of the man who took the 27-year-old into Trafalgar House police station in Bradford.
The wanted man had been sought by police in connection with a number of alleged offences.
A member of the public dressed in a full Batman outfit took him into the station on February 25.
A spokesman said: "The person who brought the wanted man into the station was dressed in a full Batman outfit.
"His identity, however, remains unknown."
The stocky, mystery man was posing as the camp 1960s incarnation of the famous DC Comics character, rather than the dark, black figure familiar to fans of the Tim Burton and Christopher Nolan film versions.
The mystery was announced by the neighbourhood police team for the Buttershaw area of Bradford on their Facebook page.
The Facebook post promoted a rush of theories on the internet, including many who suspected the arrested man may possibly know the mysterious crime-fighter - especially as there appears to be little sign of any struggle.
The arrested man was later charged with handling stolen goods and fraud related offences and will appear before magistrates on Friday.
