A dedicated team of police officers, set up to handle security incidents on the MRT system, have begun their patrols.
But will they shoot to kill if they come across suspected suicide bombers?
"Yes, they may have to", explained Home Affairs Minister Wong Kan Seng when he replied to a question in Parliament on Monday.
Bags and items being checked onboard trains will soon become a common sight for the 1.2 million commuters using the MRT daily.
While patrols by police officers at MRT stations are not new, these officers from the Police MRT Unit have been specially selected and trained to deal with security incidents.
Unlike troopers from the Special Operations Command (SOC) with their red berets, these officers don blue berets.
They are also equipped with less firepower - the Taurus service-revolver and T-baton.
But in the face of potential threat, will these officers shoot to kill?
Member of Parliament Irene Ng, who raised this question, cited the shooting of an innocent man in London who had been mistaken for a suicide bomber.
Mr Wong said: "We have to evolve our rules of doctrine according to the circumstances. In our context today, we have not come across a suicide bomber case and we hope we will not come across one.
"But I would not rule this out because suicide bombing is one of the preferred techniques of the terrorists to frighten and intimidate normal citizens.
"In the case of other countries where they have experienced this, they have adopted a shoot-to-kill policy because they cannot live with the chance that this person may turn out to be an innocent person as you have seen in the case of London.
"If an officer is confronted with a situation where there is immediate danger to life, he is authorised to use the necessary force to remove the danger and this may extend to the use of firearms.
"The police officer has to use his judgement. He has to assess at the time when he is confronted with a person, who may appear to be a suicide bomber and who in his opinion, he has to neutralise the threat, he may have to take such an action."
The highly-visible officers will patrol in pairs in and around the MRT stations, and depending on the circumstances, other specialist units may also be activated to deal with the situation.
Deputy Superintendent of Police Bernard Ng, OC of Police MRT Unit, said: "The Police MRT Unit is set up to complement the existing security measures implemented by the MRT operators, which include the surveillance cameras and security guards."
Their deployment at bus interchanges is also under consideration.
Police said for the officers to be effective, there would not be any regular scheduled patrolling.
Instead, they will adopt a flexible schedule where their presence would be both random and unpredictable.
The public is advised not to be alarmed by the enhanced patrols.
WAT D HELL R DEY DOIN IN MRT TRAINS NOW???AAARGGH!!DEY'RE EVERYWHERE!!!!!!!!!!!!!!!!!!!!!!!!
