INDEPENDENCE, Ohio -- Cavaliers security officials are trying to determine if they can identify a fan who yelled a slur at Spurs guard Patty Mills during Sunday's game.

As Mills was shooting a free throw late in San Antonio's 110-94 win, a fan yelled: "Hey Jamaica called, they want their bobsledder back;" and, "Hey Mills, Jamaica just called, they want their bobsledder back."

Mills is black and from Australia with aboriginal roots.

A Twitter use shared footage of the incident to her account from ABC's broadcast of the game. There is no obvious culprit in the footage. A Cavs spokesman said team security officials were looking into it.

@KingJames am I the only one who heard this guy in the crowd yell “hey Jamaican dog they want their bobsledder back! Hey @Patty_Mills Jamaica just called, they want their bobsledder back!” 😳😠🙅🏾‍♀️ #SundayFunday ??? @NBA pic.twitter.com/RvHdu88Gzd — Zandra Ashley (@thats_Z_Truth) February 25, 2018

Late Sunday night, Mills responded to the original Tweet: