Outgoing health minister Dr York Chow Yat-ngok has become the first top official to publicly raise doubts about the suspicious death of Tiananmen activist Li Wangyang.
Chow said that judging from the available evidence, it 'did not look like a suicide'.
He called on people close to the central government to express Hongkongers' concerns over the incident to Beijing.
Another outgoing official, security minster Ambrose Lee Siu-kwong, also commented on the incident for the first time, expressing hope that the truth would come out.
Their comments follow Sunday's protest by 25,000 people demanding an investigation into Li's death in his hospital room in Shaoyang, Hunan last Wednesday.
His sister and her husband found him hanging from the window, but his feet still reached the ground.