SINGAPORE — There is heavy police and security presence around the entrance to the VIP Complex at Changi Airport, ahead of North Korean leader Kim Jong-un's arrival into the Republic.

Mr Kim is widely expected to touch down at Changi Airport on Sunday (June 10), ahead of his highly anticipated summit with United States President Donald Trump on Tuesday. Details of Mr Kim's arrival have not been made public, although TODAY understands that he is expected to reach in the afternoon.

Prominent figures visiting Singapore — including politicians and international celebrities — arrive regularly through the VIP Complex and the nearby JetQuay CIP (Commercially Important Person) Terminal.

When TODAY arrived at the VIP Complex just after 9am on Sunday, at least 15 police officers were seen near its entrance, some of whom were moving red-and-white barriers in front of the complex. At least 70 metal barricades were also seen encircling the entrance as well as the boulevard across from it.

Police officers are standing guard at various points near the entrance.

Mr Trump's Air Force One jet is set to arrive at the Paya Lebar Air Base later in the day, around 8pm. His motorcade will travel from the air base to the Shangri-La Hotel on Orange Grove Road — where he will be staying — between 8.45pm and 9pm, the White House said.

Mr Kim is widely reported to be putting up at the St Regis Singapore hotel on Tanglin Road.

In preparation for Tuesday's meeting, the Singapore Government has gazetted from June 10 to 14 areas near the two hotels, as well as the entire Sentosa island, Sentosa Gateway and its surrounding waters as special event areas. The historic summit will take place at the Capella Singapore hotel on Sentosa.

Businesses in the affected areas had told TODAY that they were not planning to scale back their operations and it would be business as usual. Capella, however, will be shut to the public for the summit's duration.

Still, those visiting the affected areas could face road closures and security checks as the authorities ratchet up security measures. For instance, those entering Sentosa on the cable cars may have their bags inspected and gantry lanes on the Sentosa Gateway could be diverted for random security checks.

At the summit, the two leaders are expected to discuss efforts to end Pyongyang's nuclear-weapons programme. No formal agenda has been released for the meeting.