According to the press statement that I read off the Business Times, Singapore:

Minister Mentor Lee Kuan Yew has been admitted to the Singapore General Hospital (SGH) to treat a chest infection, a press statement said on Wednesday.

‘Minister Mentor Lee Kuan Yew was planning to attend Dr Balaji’s wake this evening, but the doctors at SGH have just admitted him for treatment of a chest infection,’ said the press secretary to Minister Mentor, Yeong Yoon Ying, in a statement.