A female passenger aboard United Flight 923 had Vaseline, a screw driver, matches and a note referencing al-Qaida, according to Phil Orlandella, spokesman for Boston's Logan International Airport.

He said the flight was escorted to Boston by two fighter jets.

The flight, with 182 passengers and 12 crew members landed safely, United spokesman Brandon Borrman said. Borrman said a female passenger was spotted engaging in some "suspicious" activity, but he could not immediately say what the activity was.