A Martyrs' Mausoleum was built at the foot of the Shwedagon Pagoda in 1947, and July 19 was designated Martyrs' Day, a public holiday. On 9 October 1983, the President of South Korea, Chun Doo-hwan, was nearly assassinated by North Korean agents during a wreath-laying ceremony at Aung San's mausoleum. The assassins detonated a bomb that they had planted in the roof of the mausoleum, killing 19 people, including four South Korean cabinet ministers, and injuring 48. Chun reportedly escaped the assassination attempt only because his car was delayed by traffic. One of the assassins was killed while trying to escape the scene, and the two others were captured. The incident led Myanmar to cut off diplomatic relations with North Korea from 1983 to 2007. Aung San's original mausoleum was destroyed by the blast, and another monument was built in its place.