Independent Commission Against Corruption Commissioner Timothy Tong has expressed his sadness at the death of ICAC Principal Investigator Alan Wu, who died today in a Tai Po traffic accident.

"On behalf of all ICAC colleagues, I would like to express our deepest condolences to his family. The commission will offer assistance to help his family during this difficult time," Mr Tong said.

At 8.53am today, Mr Wu was driving his motorcycle along Bride's Pool Road towards Sha Tau Kok. He reportedly lost control and fell near Chung Mei. He was then trapped under a private car travelling along Bride's Pool Road towards Tai Po Town Centre.

He was sent to Alice Ho Miu Ling Nethersole Hospital where he was certified dead at 9.33am.