Aquino was diagnosed with advanced colon cancer last year and confined to a Manila hospital for more than a month. Her son said the cancer had spread to other organs and she was too weak to continue her chemotherapy.

Supporters have been holding daily prayers for Aquino in churches in Manila and throughout the country for a month. Masses were scheduled for later Saturday, and yellow ribbons were tied on trees around her neighborhood in Quezon city.

President Gloria Macapagal Arroyo, who is on an official visit to the United States, said in a statement that "the entire nation is mourning" Aquino's demise. Arroyo declared a period of national mourning and announced a state funeral would be held for the late president.

TV stations on Saturday were running footage of Aquino's years together with prayers while her former aides and supporters offered condolences.

"Today our country has lost a mother," said former President Joseph Estrada, calling Aquino "a woman of both strength and graciousness."