Police and HAZMAT are investigating 'suspicious substance' found at Woodleigh MRT Station

69-year-old man arrested for the Woodleigh MRT powder incident

The police also tweeted that "suspicious substance" was found at the station.

In a post on Facebook on Tuesday afternoon (18 April), the Singapore Police Force said police and Singapore Civil Defence Force's HAZMAT officers are "managing the incident".

Assistant station manager Mailyn B Carriaga told Channel NewsAsia that white powder (pictured below) had been found in three to four places at the station's concourse area.

The police also advised members of the public to not speculate on the incident.

The station is temporarily closed as investigation proceeds.

It was a 58-year-old cleaner at the station who discovered what looked like suspicious white substance. Free bus rides are available at bus stops between the Serangoon and Potong Pasir stations. On April 2, a 39-year-old man who left an unattended bag at Hougang MRT station sparked security fears and a brief shutdown of the station.

This is the second time in a month that an MRT station was shut down due to security concerns. The police found only household items in the bag.

The station resumed operations at 4.20pm.

"Every security incident should be investigated", he said. Speaking to reporters after that, Member of Parliament (Potong Pasir) Sitoh Yih Pin said: "Much as we always hope that nothing untoward will happen, we must always be prepared in case something does happen".

The Singapore Police Force announced that they have arrested a 69-year-old man in relation to the "suspicious substance" incident.