Three people were injured on a Delta Air Lines flight to Beijing on Thursday night after a passenger reportedly tried to enter the cockpit. The chaos unfolded shortly after the plane took off from Seattle, when the airline said a “security incident” forced the twin-aisle Boeing 767-300ER to return to Seattle-Tacoma International Airport escorted by U.S. military fighter jets. Delta said a passenger was restrained and taken into custody by police after returning to the gate. The airline did not provide further details, but CNN cited two people familiar with the matter saying two passengers and a crew member were injured after the unnamed passenger tried to get into the cockpit. The plane was set to re-depart for Beijing on Thursday night.