CANTON, Miss. (AP) - Canton Mayor William Truly says he erred in using city letterhead stationery to announce his re-election campaign.

Truly told The Clarion-Ledger ( ) that he didn't know it was against the law.

Deputy State Auditor Pat Dendy says no city supplies can be used in political campaigns.

Listed behind the city's identifying logo with the ``one people, one voice, one goal' motto underneath and Truly's name as mayor to the left and the aldermen's names to the right, the press release has the headline ``Mayor William Truly Announces His Candidacy for 2013.'

Photocopies of the announcement were distributed in early March.

Truly is one of four Democrats in the mayoral race. Two Republicans are also running. The party primaries are May 7. The general election is June 4.