Two men have been arrested on suspicion of a fraud linked to last year's council elections in Stoke-on-Trent.
The men, both 31, were arrested as part of a wider fraud investigation on Tuesday and their homes were searched.
Neither men are understood to be councillors. Both were released on police bail.
Ch Supt Bernie O'Reilly said: "Staffordshire Police treat such allegations seriously and investigates them thoroughly."
He said further arrests in the investigation were likely.