The spokesman continued: “The work is specifically investigating the process of how candidates were put forward and represented in the ward, and if this adhered to the relevant legislation and electoral procedures.
“We are working closely with the Electoral Commission and local partners as part of our enquiries.
“We will provide further updates as we progress our investigation further.”
During the recent elections across England and Wales, Labour lost control of Tameside Metropolitan Borough Council, which elects a third of its councillors over four years.
However, in St Peter’s ward, the party won with 1,352 votes, with an independent candidate receiving 1,175 and Reform UK with 864.