The National Basketball Association (NBA) announced Wednesday night that it is suspending its season indefinitely beginning Thursday.

The announcement comes after Utah Jazz center Rudy Gobert preliminarily tested positive for COVID-19 earlier in the night. The test result was reported just prior to tip-off of Wednesday’s scheduled Jazz road game against the Oklahoma City Thunder at Chesapeake Energy Arena. The game was cancelled and according to the NBA, Gobert was not in the arena.

Players were on the court for warmups when they were told to return to their locker rooms. About 30 minutes after that happened, fans were informed that the game was postponed “due to unforeseen circumstances.”

Jazz guard Emmuanuel Mudiay was also ruled out with an illness Wednesday night. It is unclear whether or not he has been tested for coronavirus.

Jazz and Thunder players are under quarantine at Chesapeake Energy Arena, NBA sources told ESPN.

The NBA regular season was scheduled to conclude in mid-April.