Guards lower the national flag to half-mast at the Istana after the passing of former prime minister Lee Kuan Yew in Singapore. Photo: Lee Hsien Loong's Facebook

Singapore Prime Minister Lee Hsien Loong (right) is greeted by a mourner outside the gate of The Istana, or presidential palace, as mourners left condolences there after the death of Singapore's founding Prime Minister Lee Kuan Yew. Photo: AP

Singapore's Prime Minister Lee Hsien Loong (centre R) and family look on as members of the Security Command arrive carrying the body of the late former prime minister Lee Kuan Yew at the Sri Temasek at the Istana in Singapore. Photo: Lee Hsien Loong's Facebook

Mr Lee Kuan Yew's body comes to rest at Istana for private family wake. Singapore's President Tony Tan and his wife, Mrs Mary Tan, paying their respects at Sri Temasek. Prime Minister Lee Hsien Loong and his wife Ho Ching received them. Photo: The Strait Times / Neo Xiaobin

A private family wake for Singapore's founding father, Mr Lee Kuan Yew, held at Sri Temasek, Istana. Li Ka Shing (right) and his son Richard Li (left) with Ho Ching at the wake. Photo: The Strait Times / Neo Xiaobin

Volunteers arrange the words "RIP" as a tribute to the late former Prime Minister Lee Kuan Yew at Singapore's Tanjong Pagar Community Club. Photo: Xinhua

A man bows as he pays his respects to late former prime minister Lee Kuan Yew at Tanjong Pagar community club, in the constituency which Lee represented as Member of Parliament since 1955, in Singapore. Photo: Reuters

Prime Minister Lee Hsien Loong addresses the nation about the passing of his father, Singapore's founder Lee Kuan Yew, during a live broadcast in Singapore. Photo: AP

Japanese Prime Minister Shinzo Abe (right) bows with Singapore's Ambassador Chin Siat Yoon (second from left) and his wife Wang Lee Moi (third from left) after signing a book of condolence for late Singapore's founding father Lee Kuan Yew at Singapore Embassy in Tokyo. Photo: AP

UN Secretary-General Ban Ki-moon (left) signs a Condolence Book for late Singaporean Lee Kuan Yew at the Permanent Mission of Singapore to the UN in New York, USA. Photo: EPA

South Korea's Foreign Minister Yun Byung-Se (left) writes a message of condolence in front of the portrait of Singapore's late former leader Lee Kuan Yew at the Singapore embassy in Seoul. Photo: AFP

Vietnam's Prime Minister Nguyen Tan Dung (centre) writes a message of condolences in front a portrait of Singapore's late former leader Lee Kuan Yew at the Singaporean embassy in Hanoi. Photo: AFP

Cambodian Prime Minister Hun Sen writes on a condolence book in Phnom Penh, Cambodia. Photo: Xinhua

A woman prays in front of flowers and condolence messages left at the entrance to the Istana presidential palace following the death of former prime minister Lee Kuan Yew in Singapore. Photo: AFP

People queue up to pen their condolences as they mourn the passing of former prime minister Lee Kuan Yew outside the Istana in Singapore. Photo: Reuters

A Singaporean cries as she reads condolence messages at the entrance to the Istana presidential palace in Singapore. Photo: AFP

Gunasegaran S., 51, from Singapore prays quietly outside the Istana presidential palace where boards were erected for members of the public to offer their condolences in Singapore. Photo: AP

People pay their respects at the tribute area at Singapore General Hospital following the death of former prime minister Lee Kuan Yew in Singapore. Photo: AFP

Well wishers place flowers, messages and prayers for Singapore's founding prime minister Lee Kuan Yew in the rain at Singapore General Hospital where he has been warded for the last 6 weeks in Singapore. Photo: Reuters

A farewell message to former Singapore Prime Minister Lee Kuan Yew at Singapore General Hospital where he passed away. Photo: AP

Office workers in the financial district buy special edition local newspapers which feature the life of the late Lee Kuan Yew in Singapore. Photo: AP

Office workers in the financial district buy special edition local newspapers which feature the life of the late Lee Kuan Yew in Singapore. Photo: AP

People writes messages of condolence for the late former leader Lee Kuan Yew at the General of The Republic of Singapore in Hong Kong. Photo: Felix Wong

Journalists gather in front of a picture of late Singapore founder Lee Kuan Yew and the "Book-of-Condolences" at its consulate-general in Hong Kong. Photo: AP

Singaporeans pay their respects after signing a condolence book for mourners dedicated to the late Singapore former Prime Minister Lee Kuan Yew at the Embassy of Singapore in Bangkok. Photo: Reuters

Chinese and Singaporeans carrying flowers arrive at the Singapore Embassy in Beijing. Photo: AP

A security guard stands at the gate of Singapore High Commission as its national flag is hung at half-mast as a mark of respect for its founding father Lee Kuan Yew, in New Delhi, India. Photo: AP

A photograph of the late former Prime Minister of Singapore Lee Kuan Yew is seen next to a condolence book for mourners, at the Embassy of Singapore in Taguig City, metro Manila. Photo: Reuters