SUNNY VALE, California: The latest twist in the sorry tale of Yahoo's part in the arrest and detention of a Chinese dissident by the Beijing authorities has resulted in a top company executive apologising for failing last year to reveal to US lawmakers all he knew.

The online giant's evp/general counsel Michael Callahan is due to appear next week before a congressional committee probing the events surrounding the imprisonment of journalist Shi Tao after Yahoo supplied the communist government with his email records and IP addresses.

In a statement to the committee Callahan said he "deeply" regretted comments he made during two hearings in February 2006.

He said he "realised" that Yahoo had additional information about the nature of the Chinese investigation into Shi Tao months after he testified that the company had "no information" about it.

Data sourced from Financial Times online; additional content by WARC staff