The Pro14 Rainbow Cup game between Ulster and Scarlets has been cancelled after positive cases of Covid-19 in the squad of the Irish regional side.
The latest round of testing indicated that four players were positive for the virus and were asymptomatic. A statement released by the club confirmed that the players along with their close contacts are under self isolation.
The game in Belfast on Saturday was set to attend by 500 spectators.
The decision also means the encounter will be recorded as 0-0 draw with Scarlets awarded four points as there was no possibility of rescheduling the game to a later date.
Ulster Rugby chief executive Jonny Petrie expressed disappointment over the development but insisted that the right decision was taken.
"We appreciate the news that our upcoming fixture is cancelled will be deeply disappointing for our supporters, particularly those who were due to join us at Kingspan Stadium on Saturday, but we are in complete agreement that the collective decision to cancel the match is the correct one," he said.
"Our priority continues to be the health and safety of our players and staff as well as the wider community."