The New York state Division of Military and Naval Affairs says a two fighter jets from a Massachusetts Air National Guard unit have conducted an air defense exercise over parts of four Northeastern states.

Officials say the exercise took place from 10 am until noon Tuesday over northeast New York, southern Vermont, western Connecticut and Massachusetts. The exercise was run by the Eastern Air Defense Sector based in Rome, near Utica.

The drill involved two F-15 jets from the Massachusetts Air National Guard's 104th Fighter Wing, a Civil Air Patrol Cessna airplane and a C-5 cargo plane from Westover Air Reserve Base in Massachusetts.

Officials say most of the activity during the exercise was not visible from the ground.