An amateur football match had to be abandoned after spectators turned up with weapons following a row on the sidelines.
Police received reports that there were children present and people took refuge in the changing rooms when things turned ugly at a cup game between Thornaby Village from Teesside and Wrekenton Blue Star from Tyneside on Sunday afternoon.
Cleveland Police said no-one was arrested and there were no injuries.
According to reports, a local man had left the park in Thornaby following a row involving spectators and returned with several others, all wearing balaclavas and carrying weapons.
The game was abandoned at half-time and police have appealed for information.