AP
There has been no official announcement of the cancellation. However, Jeff McDonald of the San Antonio Express-News is reporting that the Spurs have boarded the team bus and left the arena.
McDonald reported earlier that the smoke was due to a "possible electrical fire." Dave Benz, the television voice of the Timberwolves reported that there was a fire "in an elevator" at the arena.
Here is an Instagram video from Benz of the smoke-filled arena: