March 02, 2021 The extra precaution is in addition to other fences and barbed wire already in place in the area. The Straits Times/ Yong Li Xuan SINGAPORE - Coils of concertina wire have been put up to deter other trespassers near the spot where a man who climbed onto the MRT tracks last Thursday (Feb 25) was killed. The extra precaution, about 150m from Kallang MRT station, is in addition to other fences and barbed wire already in place in the area. The concertina wires beef up security at a part of the overground track where elevated fields, scalable features on the viaduct and the proximity of a footpath to the track make it especially vulnerable to intruders.