Lawyers for alleged match-fixer Dan Tan Seet Eng confirmed yesterday that Tan is again being held and investigated under the Criminal Law (Temporary Provisions) Act (CLTPA).

The 51-year-old - described by Interpol as "the leader of the world's most notorious match-fixing syndicate" - was detained under the same Act without trial for two years before he was released last week.

The Court of Appeal had found his detention under the Act unlawful as his alleged match-fixing activities did not threaten public safety here.

Tan was re-arrested by the police last Tuesday night for "suspected involvement in criminal activities".

Tan's lawyer, Mr Hamidul Haq, told The Straits Times that he was informed by the police after Tan's arrest that his client was being held under the CLTPA. "We have confirmation that they are investigating under the CLTPA again," said Mr Haq. "The lawyers have requested for permission to meet with (Tan), but we have been told that investigations are ongoing and we will not be able to see him just yet."

Under the CLTPA, the police can detain a person for up to 16 days after arrest, while investigations are ongoing.

Home Affairs and Law Minister K. Shanmugam had said on Wednesday that if a decision is made to detain Tan without trial again, the grounds for his detention will be set out in full to comply with the Court of Appeal's ruling.

"In this case, the court accepted that illegal match-fixing could come within the CLTPA. The Court of Appeal, however, said that the Detention Order issued against Dan Tan did not comply with the requirements of the Act, and did not adequately set out the grounds which justified the detention.

"If he is detained under the CLTPA, the Detention Order will set out the grounds in full, as advised by the Attorney-General's Chambers, and will comply with the terms of the judgment," he said.