While in prison in November 2006, Chee reportedly became ill, leading to speculation from the SDP that he had been poisoned. A statement released by the SDP noted that Chee was feeling nauseous and dizzy, and was unable to sleep. Four days later, the Ministry for Home Affairs (MHA) asserted that Chee was treated the "same as other prisoners", and that the SDP's claims were "baseless, malicious and seek to undermine the reputation of the Singapore Prison Service". On 3 December 2006, after the doctor at the Queenstown Remand Prison had found traces of blood in Chee's urine, he was admitted under guard to Changi General Hospital. On 10 December, about a dozen of Chee's supporters, including members of his family, held a protest march starting at the Speakers' Corner and ending at Queenstown Remand Prison, where Chee was incarcerated. Several foreign non-government organisations released statements expressing concerns about Chee's health and treatment in prison.