Police are investigating an attempted robbery at a jewellery and antiques event at the Masonic Hall in Swinton, Greater Manchester. According to reports, three men wearing balaclavas are alleged to have approached the premises during the day-long event. The suspects reportedly carried a BB gun and a bat. The robbery attempt is described as botched, and the men did not complete the alleged theft. Officers are now trying to identify the trio and appeal for information from the public. The reports indicate the incident is under investigation, with police focusing on the circumstances leading up to the attempted hold-up and whether anyone was injured. No additional details on arrests, charges, or the outcome of the attempted theft are provided in the available accounts. The event location and timing are consistent across the reports, which also identify Swinton and the Masonic Hall as the scene. Police inquiries are ongoing.