MANILA - Justice Secretary Agnes Devanadera on Thursday said 10 more people including three members of the Ampatuan clan have been placed in an immigration watchlist after being linked to the massacre of 57 civilians in Ampatuan, Maguindanao last November 23.

The 10 are Datu Ulo Ampatuan, Datu Kanor Ampatuan, Tony Kenies Ampatuan, Esmael Canapia, Takpan Dilun, Datu Abdullah Sangki, Muhamad Sangki, Tammy Masukat, Tumi Timba Abas and PO1 Abbey Guiadem.

Assistance State Prosecutor Richard Fadullon also clarified that six Ampatuans whom the Criminal Investigation and Detection Group recommended to be charged with murder have not yet been indicted. He said the six will undergo a preliminary investigation first at the Department of Justice to determine if there is probable cause to file charges against them.

The Bureau of Immigration (BI) earlier said it has placed several members of the Ampatuan clan on its watchlist over their alleged involvement in the Maguindanao massacre.

Included in the watchlist are family patriarch and Maguindanao Governor Datu Andal U. Ampatuan, Sr.; Datu Ansay Mayor Datu Andal U. Ampatuan, Jr;  ARMM Regional Governor Zaldy U. Ampatuan; Nords Ampatuan, Akmad Ampatuan, Sr.; Akmad Ampatuan, Jr; Saudi Ampatuan, Jr.; Bahnarian Ampatuan, and Sajid Islam Ampatuan.

Ampatuan Jr.  is the primary suspect in the abduction and massacre of 57 people including the immediate family and relatives of Buluan Vice-Mayor Esmael Mangundadatu, and several media men. President Arroyo has declared a state of emergency in MAguindanao, Sultan Kudarat and Cotabato City after the incident.

The military on Thursday poured in more troops to Shariff Aguak in Maguindanao to guard the members of the Ampatuan political clan after they allegedly received death threats.

In a press briefing, Armed Forces spokesman Lt. Col. Romeo Brawner also said the deployment of the 33rd Infantry Battalion from Lanao del Sur is also part of their preparation for the possible serving of arrest warrants to other members of the Ampatuan family.

A total of four battalions are now stationed at Shariff Aguak, where the provincial governor and the Autonomous Region in Muslim Mindanao governor hold office. The Ampatuans have two “main houses” in the town, including a mansion in front of the capitol, and both are under guard by the military.

"We deployed the 33rd Infantry Battalion at the capitol of Maguindanao in Shariff Aguak. This is in preparation for any legal actions that may be carried out on the family of Ampatuan and augment the security forces that we have in the area to prevent any violence that can occur because of these legal actions," he said in an interview on ANC.

The Philippine National Police has recommended the filing of charges against more members of the Ampatuan in connection with the November 23 massacre.

At present, only Datu Unsay town mayor Andal Ampatuan Jr remains detained and charged with multiple murder.