BOSTON (AP) — A fire aboard a Virgin Atlantic flight headed to London forced the plane to make an emergency landing in Boston.

Massachusetts State Police said in a news release that the crew extinguished the fire, which a preliminary investigation says probably started with a phone charger that ignited in a passenger seat.

All 217 passengers on Flight 138 from New York as well as the crew were safely evacuated after landing. One passenger refused treatment for a smoke-related complaint.

A Virgin Atlantic statement says the flight was bound for London’s Heathrow Airport.

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It was the second unusual landing at Boston’s Logan International Airport on Thursday. Earlier, an American Airlines jetliner from Chicago declared an emergency when a cockpit light indicated an unspecified potential mechanical problem as it approached the city, but the plane landed without incident.