South Korea has shut down central Seoul for a comeback concert by Kpop supergroup BTS, known as ARMY, in preparation for their first performance in over three years since completing mandatory military service. The event is set to take place at Gwanghwamun square, which is expected to attract an estimated 260,000 fans and millions more to watch the show live on Netflix. Seoul police have closed streets and erected fences and metal detectors around the square, and have said they will jam signals of any unauthorised drones. The Seoul government has also secured medical stations and 2,551 toilets open to the public. The concert, which organisers gave away 22,000 free tickets, will be open to non-ticket holders who can watch the performance live via giant screens. Analysts predict that the event could bring in total ticket revenue of at least 1.5 trillion won and total attendance of between 5 and 6 million fans across the tour.