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.

“ 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.”