ST. LOUIS (AP) — Plans for a wingsuit flight over downtown St. Louis have been called off over security concerns.

Alexander Polli, a 28-year-old wingsuit flyer with a huge following on YouTube, had planned to jump from a plane about 4,000 feet above downtown about an hour before Friday night’s Cardinals game against Atlanta. Plans called for him to do stunts during a three-minute flight in the aerodynamic wingsuit.

But spokeswoman Meghan Spork said Friday that “new security concerns” were raised in conversations with local government and the Federal Aviation Administration, forcing cancellation of the event. Messages seeking details of those concerns were not returned.

Spork says Polli may try again in St. Louis in the future.