NBA team the Golden State Warriors has issued a fraud alert after announcing it has turned away more than 600 fans with fake tickets during the first half of the 2016-17 season.

The Warriors have warned their supporters about the potential dangers of purchasing single-game tickets from a non-verified third party.

The Oakland, California-based team said it has denied 650 fans access to Oracle Arena on matchdays due to counterfeit tickets purchased from non-verified third-party vendors.

It said fans looking to attend Warriors games during the 2016-17 season are encouraged to purchase tickets directly from the team through the official website or the Oracle Arena Box Office.

“Warriors.com offers fans the only verified marketplace for all Warriors ticket needs, including official resale tickets from season ticket holders and other fans, that is guaranteed by the Warriors organisation,” said a spokesperson. “The Warriors resale marketplace offers a safe and convenient way for fans to access all levels of tickets throughout the regular season and playoffs.”