The collapse of the Hotel New World (Chinese: 新世界酒店倒塌事件; Malay: Runtuhnya Hotel New World ; Tamil: நியூ வர்ல்டு சம்பவம்) occurred on 15 March 1986, and was Singapore's deadliest civil disaster since the Spyros disaster of 12 October 1978. The six-storey building situated at the junction of Serangoon Road and Owen Road rapidly collapsed, trapping 50 people beneath the rubble. Seventeen people were rescued, whilst 33 were killed.
Although frequently referred to as the Hotel New World, the building in question was actually the Lian Yak Building (联益大厦), which was completed in 1971 and consisted of six stories and a basement garage. The Hotel New World, previously known as the New Serangoon Hotel until 1984, was the main tenant occupying the top three floors, and a branch of the Industrial and Commercial Bank (now merged with United Overseas Bank) took up the ground level. A nightclub, Universal Neptune Nite-Club and Restaurant, was also situated on the second level of the building at the time of the collapse. The building had previously experienced a poisonous gas leak (caused by carbon monoxide) in some of the hotel rooms, first hitting the headlines on 30 August 1975, the day after the poisonous gas leak was reported.
On 15 March 1986, the building rapidly disintegrated in less than a minute at about 11:25 am, leaving little time for anyone within it to make their escape. Witnesses reported hearing an explosion prior to the collapse, but the police ruled out the possibility of a bomb attack. A gas explosion was thought to be a possible cause.
The collapse was met with shock by many, including the then Prime Minister Lee Kuan Yew who was quoted as saying that "the collapse of such a building is unprecedented."
Immediately after the collapse, as many as 300 were feared trapped underneath the debris. Estimates dropped to 100 trapped or missing a day later, and then to 60, including 26 hotel staff and 16 bank staff unaccounted for. The figure was finally put at 50 when the official death toll was announced on 22 March 1986 after the end of the rescue effort. Amongst those killed, 23 were Singaporeans, and the other ten foreigners.