A technical fault in air traffic control disrupts flights at Zurich Airport after security measures are put in place for U.S.-Iran peace talks in Switzerland, authorities said. The issue arises when a restricted no-fly zone over Buergenstock—where the negotiations are held—is integrated into radar display systems. Swiss air navigation service Skyguide says the fault occurs following the integration of the restricted zone over the Buergenstock area into radar systems. Aviation authorities report that the disruption affects airport operations on Sunday. According to the accounts cited by multiple outlets, the problem is triggered by the air traffic control system responding to the newly configured security airspace. Authorities also say the technical glitch is resolved, and normal operations resume after the fault is corrected. The reports describe the incident as operational and related to the implementation of security arrangements for the talks, rather than an attack or weather-related disruption.