Police in Sheffield are asking witnesses to come forward after two men were allegedly seen with knives at Norton Sports Ground in Warminster Road.
The incident happened at about 1pm on Sunday November, 20 when it is reported that after a football match held at the ground, two white men got out of a car carrying what are believed to be knives.
They then got back into the car, a silver Peugeot, and left the area. No one was injured during the incident.
Officers investigating the matter believe the incident may have been recorded on a mobile phone by people at the sports ground and would like to hear from them.
Do you have any information that could help officers with their inquiries? Call 101, email firstname.lastname@example.org or contact Crimestoppers anonymously on 0800 555111.