Alleged fraud in the recent local elections is being investigated in nearly half of London's boroughs.
Between 25 and 30 offences have been reported in 13 boroughs, the Metropolitan Police Authority (MPA) revealed on Thursday.
MPA member Tony Arbour said his colleagues would be "absolutely astonished to find out that in half of all the London boroughs there have been complaints".
The Met's Special Branch is investigating allegations of fraud in Barnet, Bexley, Croydon, Ealing, Greenwich, Harrow, Hounslow, Kensington and Chelsea, Lambeth, Merton, Richmond, Southwark and Sutton.
An inquiry is also underway in Tower Hamlets to identify victims, witnesses and evidence.
More complaints could follow, as the law allows 12 months to bring prosecutions for such electoral offences.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article