"We are concerned that the system has few checks and balances to prevent the abuse of government".
Dr Lee Wei Ling and Mr Lee Hsien Yang have not responded to date and have indicated that if they respond at all, they will only be able to reply at the earliest by the end of June, Mr Tan said. It is heart-wrenching for me to leave this country.
Hsien Loong, who is travelling overseas with his family, said he was disappointed and saddened by his siblings for "publicising private family matters".
The statement said that the younger Mr Lee and Ms Lee were "hugely uncomfortable and closely monitored" and that they felt their "big brother omnipresent".
Prime Minister's brother Lee Hsien Yang said in a Facebook statement that he was leaving Singapore, citing the Hsien Loong as the sole reason for his departure. "We have nothing to gain from the demolition of 38 Oxley Road other than the knowledge that we have honoured our father's last wish", said the siblings.
About their brother, they said they felt threatened by what they perceived as the Prime Minister's misuse of his position and influence over the Singapore government to drive his personal agenda. Among those attending the funeral will be Southeast Asian heads of state and Prime Ministers Narendra Modi of India and Tony Abbott of Australia. "We have lost confidence in him", it added. He is now chairman of the Civil Aviation Authority of Singapore. Ho Ching has run Temasek Holdings, the sovereign wealth fund controlled by the Singapore Ministry of Finance, since 2002 after serving as president and chief executive officer of the government-owned Singapore Technologies. Reuters was unable to independently verify the accusations. "Not from my brother because we communicate via lawyers", he said in an interview. "We also believe, based on our interactions, that they harbor political ambitions for their son, Li Hongyi". He also denied the allegations, especially the "absurd claim" that he has political ambitions for his son.
Lee, who is now away on holiday, denied the allegations. "In particular that means upholding meritocracy, which is a fundamental value of our society", he added.
Mr Lee Hsien Yang and Dr Lee subsequently issued a statement as executors and trustees of their father's last will, outlining their father's wishes regarding the house as long as Dr Lee lives there.
In his statement, Lee said "I will do my utmost to continue to do right by my parents".
In this photo, taken March 29, 2015, the family members of the late Lee Kuan Yew arrive with his portrait at the start of the state funeral at the University Cultural Center in Singapore.
Lee Kuan Yew
Lee Kuan Yew died a widower in 2015. They become a shambles after a while.
They said they had seen a "completely different face" of Hsien Loong after the passing of their father and former prime minister Lee Kuan Yew in March 2015, and that the changes in Singapore since their father's death do not reflect what he stood for.
Lee Hsien Loong is now overseas on holiday with his family.
Dr Lee Wei Ling and Lee Hsien Yang also said they no longer trusted their elder brother and have lost confidence in him as a leader.
Hsien Loong and his wife, Ho Ching, have opposed Lee Kuan Yew's wish to demolish his house, even when Lee Kuan Yew was alive, they stated. These included looking into various aspects including the historical and heritage significance of the house as well as to consider Mr Lee Kuan Yew's thinking and wishes in relation to the house.
However, in Wednesday's statement, Wei Ling and Hsien Yang claimed the prime minister and his wife are behind what is represented as government initiatives to preserve the house.
It is the second time in 15 months that the issue has exploded into public view.
Lee Wei Ling with her father and mother Kwa Geok Choo in 2003.
The public dispute involving the country's first family has gone viral online in a country where open criticism of the ruling party is rare.