Football League referee Dean Mohareb has been arrested on suspicion of computer hacking.
Mohareb, 29, of Stockport, was due to officiate at yesterday's npower Championship game between Barnsley and Peterborough but was stood down.
Mohareb is a senior member of the Football Association's Referees Department in his role as national referee development manager.
It is understood the arrest was prompted by claims he hacked into a colleague's email account.
A spokesman for Greater Manchester Police said: "On Sunday 30 September, police seized a number of electrical items as part of an investigation into computer hacking and the dissemination of private information.
"A 29-year-old man was arrested on suspicion of unauthorised access to computer material/data, under section 1 of the Misuse of Computers Act 1990.
"The man has since been bailed until November 26."