MANILA, Philippines – (UPDATE 2) A group of bloggers and a retired general have filed an intervention at the House of Representatives to add the Memorandum of Agreement on Ancestral Domain between the government and the Moro Islamic Liberation Front (MILF) to the charges in the impeachment complaint against President Gloria Macapagal-Arroyo.

Philippine Daily Inquirer columnist, INQUIRER.net blogger, and television host Manuel Quezon III, the lead intervenor, said there should be an effort "to put together as strong and comprehensive a case as possible in order to properly and thoroughly address all the issues that demand accountability from the chief executive."

"In our view, Congress should look into the issue of the Bangsamoro Juridical Entity-MOA between the President and the MILF on Mindanao. The talks were held with the knowledge of the President; the contents of the agreement has been declared unconstitutional by the Supreme Court,” Quezon said in Filipino in a prepared statement he read in a news conference.

Retired general Fortunato Abat, one of the intervenors, said the attempt to sign the MOA-AD with the MILF was one of the "most serious" issues that could merit an impeachment trial of the President.

Richard Rivera, another intervenor, said the people of Mindanao have been used to push for the political interests of the President.

The group was accompanied by Jose de Venecia III and Leah Navarro of the Black and White Movement, two of the complainants in the original impeachment complaint.

John Paul Lero, one of the counsels of the group, clarified that their initiative was not an amendment to the complaint, but an intervention because "it has a different set of parties as intervenors not included in the original complaint."

De Venecia III said there was no precedent case yet of a party filing an intervention to an impeachment case.

"We are confident that the first impeachment complaint will stand. Hopefully the intervention will be taken into consideration," De Venecia said.

Quezon said they were "taking the risk" of filing the intervention even amid the danger that this would be treated as a separate complaint and would therefore quash the original one.

Marilyn Yap, the House secretary general, received the document but said that she would wait for instructions from the justice committee since it was the first time that a group has filed a motion for intervention to an impeachment complaint.

She said the committee would have to determine what to do with the motion.