Boston ? Two fighter jets were scrambled Wednesday to escort a London-to-Washington flight to an emergency landing in Boston after a disturbance in which passengers said a woman in a jogging suit paced up and down the aisle, peppering her incoherent mutterings with the word “Pakistan.”

The federal official for Boston’s Logan International Airport said there was no indication of terrorism, but passengers said they were unnerved by the woman and by the military response, just a week after authorities in London said they foiled a terror plot to blow up flights to the U.S.

“It was a harrowing two hours,” said Antony Nash, 31, who was on his way home to San Diego and was seated near the woman.

“I noticed F-15s next to the plane. I said, ‘Oh my God.’ And then we saw the emergency vehicles” waiting on the tarmac, Nash said.

Gov. Mitt Romney said the 59-year-old woman was from Vermont and became so claustrophobic and upset that she needed to be restrained. The FBI in Boston said the woman, a U.S. citizen, was arrested on charges of interfering with a flight crew.

Passengers said two plainclothes men on board and flight attendants ran up the aisle and tackled the petite woman, slamming her into the bathroom door, throwing her to the ground and putting her in handcuffs, passengers said.

A Massachusetts State Trooper directs a group of passengers from United Flight 923 to the security checkpoint at Terminal C at Logan International Airport in Boston. The London-to-Washington flight was diverted to Boston on Wednesday after the pilot declared an emergency because an apparently claustrophobic passenger caused a disturbance.

The disturbance was enough of a concern that the pilot declared an emergency, which activated two fighter jets to escort the plane into Logan, said George Naccara, security director for the Transportation Security Administration for Massachusetts’ airports.

Two F-15s were sent from Otis Air National Guard Base on Cape Cod to escort the airliner, said Master Sgt. Anthony Hill, spokesman for the North American Aerospace Defense Command in Colorado Springs, Colo. He said the fighter pilots can intercept, shadow or escort commercial aircraft and, if ordered, shoot down an aircraft deemed to be a threat.

State police and federal agencies took control of the plane after it landed.

Passengers were taken off the plane, put on a bus and taken to a terminal to be interviewed, Naccara said. Their luggage was spread out on the tarmac, where it was rechecked by security officials and trained dogs.

Joan Bartko, of Manassas, Va., said everyone on the plane did as they were told.

“It was sort of surreal,” she said. “You just know the best thing to do is stay calm.”

The passengers were allowed onto another flight to Washington later Wednesday.