The Combat Engineers and Explosive Ordnance Disposal (EOD) team successfully detonated a war relic around noon on Tuesday.
The 100kg relic was found in a construction site in Seletar yesterday, according to the Singapore Armed Forces (SAF) Facebook page.
In a separate post, the SAF said it was "armed and more than 60 years old".
According to a report by The Straits Times, construction workers said that the relic measures about 1.2 m and was placed in a sack and buffered by sandbags before being detonated.
The report added that several offices around the Seletar Aerospace Park were evacuated while operations were underway.
The last relic was discovered in Jurong Island in August.