A Massachusetts man allegedly tried to stab a flight attendant and open the door of a United flight from Los Angeles to Boson, according to federal prosecutors.

Francisco Severo Torres, 33, was charged with one count of interference and attempted interference with flight crew members and attendants using a dangerous weapon.

Authorities say that 45 minutes before the flight landed in Boston on Sunday, a cockpit alarm went of indicating that an emergency door between first class and coach had been deactivated.