Prime Minister Mette Frederiksen has said the incident was "the most serious attack" on Denmark's critical infrastructure. A number of flights were diverted from Denmark's main airport after drones disrupted operations. Danish Prime Minister Mette Frederiksen on Tuesday said the incident at Copenhagen Airport, in which large drones disrupted operations, constituted "the most serious attack on Danish critical infrastructure to date." Frederiksen noted that the attack aligned with the recent trend "other drone attacks, airspace violations and hacking attacks on European airports." Copenhagen Airport halted operations on Monday after multiple drones were spotted in the area, Danish police said.