The Hotel New World disaster occurred on 15 March 1986, and was Singapore's deadliest civil disaster since the Spyros disaster of 12 October 1978. The six-story building situated at the junction of Serangoon Road and Owen Road rapidly collapsed, trapping 50 people beneath the rubble. 17 were rescued, while 33 were killed.
http://www.singapedia.com.sg/entries/h/hotel_new_world_collapse.html