<P> After midnight, however, the dying fire suddenly reignited, quickly getting out of control . Despite the efforts of the more than 360 firefighters who were at the scene, the fire soon ended up destroying the entire wooden structure and causing substantial damage to the stone walls . The fire did not result in any injuries . </P> <P> Originally, the fire had been suspected to be accidental . However, many witnesses reported seeing someone enter the gate shortly before the fire, and two disposable lighters were found where the fire was believed to have started . </P> <P> Later investigations revealed that the fire was indeed an act of arson . A 69 - year - old man, identified as Chae Jong - gi (Hangul: 채종기; Hanja: 蔡宗基), was taken into police custody on February 12, on the suspicion that it was he who started the fire . Chae confessed to the crime 30 minutes after his arrest . According to police reports, Chae arrived at Namdaemun around 8: 35 p.m. carrying an aluminum ladder, three 1.5 - liter bottles of paint thinner, and two cigarette lighters . With the ladder, he climbed the western wall of the gate, entered the gate, and walked up to the second floor . There, he started the fire by sprinkling the floor with paint thinner and lighting it . Chae stated that he had started the fire because he was upset about not having been paid in full for land he had sold to developers . Chae had also been charged with setting fire to the Changgyeong Palace complex in Seoul in 2006 . </P> <P> The reason he targeted Namdaemun was because it was easily accessible and was only secured by motion sensors . He also considered attacking trains or buses, but decided against it due to the high number of casualties this would cause . </P>

Where had the man set a fire in 2006 for which he was also arrested and charged