Two core leaders of the Thai anti- government United Front for Democracy against Dictatorship (UDD) will definitely show up at the Criminal Court on Tuesday, UDD lawyer Karom Poltaklang said, the Bangkok Post's website reported.

The two core leaders, who are Jatuporn Prompan and Karun Hosakul, are also the MPs of the country's major opposition Puea Thai Party.

Jatuporn, Karun, and Vichien Khaokham are required to report to the Criminal Court on June 8 when the Department of Special Investigation (DSI) would seek the court approval for their detention, DSI secretary-general Tharit Pengdit said on June 2.

However, Karom said Vichien, the northeastern Udon Thani province MP, could not travel to the court as he is on duty in other province.

The three MPs have faced terrorism charges in connection with the May 19 rioting and arson attacks.

Meanwhile, two other wanted anti-government "red-shirt" leaders, Arisman Pongruangrong and Suporn Attawong, were still alive and he had been in regular contact with them, the lawyer said.

"Mr Arisman and Mr Suporn will surrender to police immediately after the government revokes the emergency decree because they don 't want to be detained without charges for 30 days," said Karom.

Prime Minister Abhisit Vejjajiva said Sunday the political situation was back to normal, but it was necessary for the government to maintain the state of emergency on fears of fresh unrest, the Nation newspaper's website reported.

The emergency decree permits armed forces to detain a suspect for an initial period of 30 days in informal places of detention without a court order or immediate access to legal counsel, family members or independent monitoring.

From April 7, 2010, the emergency rule has been imposed in these provinces, including Thailand's capital Bangkok, giving police and army expanded powers to control the prolonged-anti- government protests.

In a bid to ensure security, the state of emergency's enforcement has been maintained though the anti-government protests ended on May 19, resulting in tremendous losses and damage to the country.