Basketball's world governing body has banned the vuvuzela from this month's World Men's Championship in Turkey because of health concerns.
FIBA is urging fans not to take the instruments to games and warned that security staff will confiscate them, while supporters also face expulsion from the tournament's five venues if they flout the ban.
FIBA is the first international sport federation to officially ban the vuvuzela from all of its events.
The noise made by the horns was a major talking point at the football World Cup in South Africa with opinion divided over the effect they had on the atmosphere during games.
FIBA officials say the vuvuzela is simply not appropriate in a confined space such as a basketball arena and that it could be harmful to a person's hearing.
New Zealand is one of the 24 teams taking part in the tournament, which starts on the 28th of August.