Earlier the day, Taiwan's top prosecutors office made the request to detain Lin and hold him incommunicado to facilitate the further probe, as a questioning that last from Sunday afternoon to early Monday morning indicated that Lin was highly suspected of committing graft and bribery crimes and they worried that Lin might seek to collude with others to destroy evidence.

Prosecutors launched the investigation last week amid surging local media reports that when serving as a "legislator" two years ago, Lin accepted a bribe of 63 million New Taiwanese dollars (2.11 million U.S. dollars) from a local businessman in return for helping his company obtain a slag treatment contract from Kaohsiung-based China Steel Corp.(CSC), in which the island's authorities had a stake.

Citing the businessman named Chen Chi-hsiang, the media reports said Lin's demand for a further 83 million New Taiwanese dollars in bribes earlier this year was turned down by him, and then Lin in April pressured CSC to stop supplying slag to his company for treatment.

Prosecutors summoned Lin for questioning Sunday afternoon after searching 11 locations for evidences, including Lin's residence and office. Lin confessed to some parts of the charges during the questioning, according to prosecutors.

Both Taiwan leader Ma Ying-jeou and head of the "Executive Yuan" Sean Chen Monday said they felt deep regret and apologized for the graft case involving Lin, stressing the importance of the integrity of civil servants and vowed to improve anti-corruption efforts.

Lin on Monday also issued a statement to apologize for his "serious dereliction of duty" and "suspected involvement in graft and bribery," and pledged to hand out all his ill-gotten gains, two days after resignation from his post in the "Executive Yuan."Prior to his confession, Lin had categorically denied the accusations of accepting or seeking bribes.