The incident happened at Templemore Sports Complex on Saturday morning.It is understood both men were led from the building after a heated exchange took place. They were then spoken to by police.Derry City Council said: "An individual who was involved in an alleged exchange of words agreed to leave the count centre. The priority for the DRO is to ensure there is no disruption to the count."Colm Eastwood MLA of the SDLP described the incident as a "storm in a teacup".He added: "I think at this time of year there is always tension and sometimes tension within political parties but it's a bit of a storm in a teacup and I don't think we will be too worried."A statement from police said they are investigating what happened.It went on: "Police received a report of an incident inside the Templemore Sports Complex in Londonderry this morning. Police inquiries into the incident are ongoing."