station had opened, alighted there by accident, having intended to alight at the adjacent Serangoon station. The operator SBS Transit deployed several staff to assist the confused commuters. Security incident On 18 April 2017, Woodleigh station was closed for about three hours after a suspicious substance was found in various areas in the station. At 1:49pm, SBS Transit announced that all trains would skip Woodleigh station due to a "security incident", though the station reopened at 4:20pm after police established the substance to be baking flour. Authorities arrested a 69-year-old man that same day for "causing public alarm" and summoned two other men to help with police investigations. The investigation revealed that the three men were members of the running group Seletar Hash House Harriers, who intended to mark a trail for other runners to follow (known as "hashing"). The man responsible was fined S$1000 (US$) for causing a public nuisance. Station details Woodleigh station serves the North East line (NEL) of the Singapore MRT and is between the Potong Pasir and Serangoon stations. The station code is NE11. Being part of the NEL, the station is operated by SBS Transit. The station operates daily from about 6:00am to 12:15am. Train frequencies vary from 2.5 to 5.0 minutes. The station is underneath Upper Serangoon Road, near the junction with Upper Aljunied Road. The station has three entrances, serving Stamford American International School, Mount Vernon Columbarium and Mount Vernon Sanctuary, along with various residential developments in the area such as Avon Park. Woodleigh station will also serve the developing Bidadari public housing estate. The station is next to Woodleigh Residences – an upcoming integrated commercial and residential development part of the estate's future town centre which will include a bus interchange. Each of the three entrances has a curved canopy with aluminium louvres; these are linked to the taxi stands and bus stops near the station. The windows at the entrances allow commuters to have a view of the station's surroundings. The station is designated as a Civil Defence (CD) shelter: it is designed to accommodate at least 7,500 people and withstand airstrikes and chemical attacks. Equipment essential for the operations in the CD shelter is mounted on shock absorbers to prevent damage during a bombing. When electrical supply to the shelter is disrupted, there are backup generators to keep operations going. The shelter has dedicated built-in decontamination chambers and dry