The Universal Orlando Resort has confirmed that the Dragon Challenge rollercoasters in the Wizarding World of Harry Potter will no longer "duel" with each other.
The Orlando Sentinel reports that the decision to stop launching the two coasters simultaneously has been made a precaution, after two incidents over the summer that saw guests being struck by loose objects. Despite an investigation, the source of the objects has not been established.
Originally known as Dueling Dragons, the Bolliger & Mabillard inverted rollercoasters were designed to come within 18 inches of each other during their respective circuits. This will now be avoided, with the two rides instead "chasing" each other rather than dueling.
In 2010, Dueling Dragons was renamed as Dragon Challenge and given a new theme as part of the opening of the Wizarding World of Harry Potter at Islands of Adventure. The two coasters were renamed from Fire and Ice to the Hungarian Horntail and the Chinese Fireball, with a new backstory being introduced based around the Twiwizard Tournament as featured in the Harry Potter stories.
Full details of the changes to Dragon Challenge can be found in the Orlando Sentinel's report.