A passenger tried to open the exit door of a jet during a flight across the United States, airline and federal officials said. United Airlines Flight 890 from Los Angeles landed as scheduled at Washington Dulles International Airport at 8:35 p.m. (0035 GMT) on Tuesday, said Amy Kudwa, Transportation Security Administration spokeswoman. No one was injured. The passenger became unruly about 3 1/2 hours into the flight from Los Angeles and was subdued by other passengers and federal air marshals, said United spokeswoman Megan McCarthy. "After the passenger was restrained, the pilot decided to land at Dulles," McCarthy said. "It wasn't an emergency landing." Airport police and FBI agents met the flight and were interviewing the passenger, said FBI spokeswoman Debbie Wierman. There were 138 passengers and six crew members on board, McCarthy said.