Crime Assistant Commissioner of Police Vincent Wong Fook-chuen said somebody took the computer to a repair shop, where the photos were found on the hard drive and distributed unscrupulously to others.

Over 1,300 photos have been seized, and most of them are obscene. Six females were involved, four of them identified as showbiz artists. Wong refused to comment on how many men were portrayed.

Chen was among the celebrities identified in the photos that depict them in sexual acts. He publicly commented on the scandal for the first time yesterday.

"I feel painful, hurt and frustration," he said in a video released to the media by his manager. "I hereby use this opportunity to apologize to anyone who's been affected by this strange ordeal."

Chen called on anyone who possessed the images to destroy them immediately.

"Let's help the wounded heal their wound," he added, calling the photos' distribution "malicious and criminal".

He said the ongoing investigation prohibited him from commenting further. Police said the Saturday arrest took place at a computer repair shop in Central and that the man would be charged with access to a computer with criminal or dishonest intent.

In addition to Chen, the celebrities pictured also resemble Gillian Chung Yan-tung, Bobo Chan Man-woon and Cecilia Cheung Pak-chi.

The five suspects arrested last week have each been released on HK$20,000 bail. They included two women and three men.

Wong said the man arrested Sunday may also be released on bail.