LONDON (AP) — Britain scrambled fighter jets Friday to intercept a commercial airliner carrying more than 300 people from Pakistan, diverting it to an isolated runway at an airport on the outskirts of London and arresting two British passengers who allegedly threatened to destroy the plane.

A British security official said the situation involving the Pakistan International Airlines flight did not appear terror-related, though police were still investigating, but the incident further rattled the U.K. just days after a soldier was killed on a London street in a suspected terror attack.