In pictures: Kim Jong Un goes on walkabout in Singapore ahead of historic summit with Donald Trump

North Korea leader Kim Jong Un (AP) Credit: AP/Press Association Images

North Korean leader Kim Jong Un has left his luxurious hotel for a late-night city tour of Singapore, just hours ahead of his historic summit with US president Donald Trump.

Mr Kim spent much of the day out of public view, sparking media speculation he was planning his strategy for the Tuesday summit with Trump.

The summit has attracted huge worldwide coverage. Credit: PA

But in the evening, he left the St Regis hotel and visited the Flower Dome at Gardens by the Bay with Singaporean Foreign Minister Vivian Balakrishnan.

The North Korean leader visited a major casino with his entourage. Credit: PA

The foreign minister posted a selfie of him and a smiling Kim wearing his trademark dark Mao suit on Facebook.

His walkabout prior to the summit came as a surprise. Credit: PA

Flanked by bodyguards, Mr Kim also visited the Marina Bay Sands resort.

The historic talks will take place in a 'one-on-one' meeting between the two leaders. Credit: PA

South Korean media reported that Mr Kim was accompanied by his sister, Kim Yo Jong, and other top deputies.

Security was high for Mr Kim's visit. Credit: PA

Some experts said Mr Kim’s city tour suggests that North Korea and the US had narrowed their differences ahead of the summit.

Kim Jong Un's talks with President Trump will take place at the Capella hotel. Credit: PA

Earlier on Monday, senior diplomats from the two countries met at a hotel to make final preparations for the summit.