Singapore turned away at least four people trying to enter the country in the period leading up to tomorrow's summit between US President Donald Trump and North Korean leader Kim Jong Un.
Speaking to the media yesterday about security for the meeting, Home Affairs and Law Minister K. Shanmugam said that an individual from an Asean country was not allowed into Singapore on Saturday after Immigration and Checkpoints Authority (ICA) officers noticed he was behaving nervously.
"He couldn't answer questions they (the ICA officers) asked. When they checked his mobile phone, they saw that he was visiting sites on suicide bombing. They made the assessment that he ought to be turned around," said Mr Shanmugam.
The minister said that besides this incident and a reported case last Wednesday in which Australian Zeky Mallah, 34, was denied entry on account of previous terror-related activities, there were two others, but he declined to elaborate.
He said that there were 5,000 Home Team officers who would be deployed for the summit tomorrow between President Trump and Mr Kim, who is Chairman of North Korea's State Affairs Commission.
Separately, the police issued a statement that two South Korean journalists who trespassed onto the North Korean ambassador's residence had been sent home. The visit passes for the two men, aged 42 and 45, were cancelled and they were repatriated on Saturday.
A security briefing took place at the international media centre at the F1 Pit Building yesterday, which highlighted the security measures in place across the island and, in particular, the areas in Tanglin and Sentosa that have been declared "special event areas" for the summit.
During the briefing, the police's deputy director of operations, Assistant Commissioner Daniel Tan, said Singapore had a multi-layered approach to event security.
The outermost is a vehicle exclusion zone, in which stringent checks on vehicles are made.
This is followed by the middle layer, also known as the person exclusion zone, where access control on persons is carried out.
At the heart of the measures is the innermost perimeter, which provides protection against armed attacks and sabotage of vital utilities.
Besides checks on persons and vehicles entering the areas designated as special event zones, patrols of the coastline and checkpoints will also be conducted by the Police Coast Guard.
AC Tan also said that the authorities have engaged owners of premises around areas involved in the summit to increase security vigilance and readiness.
The police's In-Situ Reaction Teams and Emergency Response Teams have been deployed at key locations to patrol and provide swift response to emergencies.
Singapore's Armed Strike Teams, which include Rapid Deployment Troops on motorbikes, will also be deployed, said AC Tan.