Gunmen kidnapped and killed at least 21 people in the southern Philippines today.
The abduction was apparently a bid to prevent one of them filing her husband's nomination for elections next year, the military said.
Lieut Col Romeo Brawner said the bodies of 13 women and eight men were found in the area where about 30 people were taken hostage.
"We believe more bodies are buried in the ground," he said. "Unfortunately the killing happened before our troops got there."
"We believe more bodies are buried," Lieut Col Brawner said. "Unfortunately the killing happened before our troops got there." Some of the victims were beheaded, and bodies mutilated, local officials said.
Military officials said the dead included Genalyn Tiamzon-Mangudadatu, who was on the way to file the nomination of her husband to contest the governorship of Maguindanao province against Datu Andal Ampatuan, the head of a powerful local family.
She was accompanied by two lawyers, several members of her family and some local journalists. The southern Philippines is riven by fierce clan rivalries, including one between the Mangudadatus and the Ampatuans. Many politicians and elected officials in the region maintain well-equipped private armies.
Mr Ampatuan has been elected governor of Maguindanao three times previously, always unopposed, although he resigned from the post earlier this year, apparently to circumvent term limits on elected officials.
Of the 22 mayors in his province, most are sons, grandsons or other relatives. Two of his sons have been killed in violence linked to clan wars.
President Gloria Macapagal Arroyo has called Mr Ampatuan a valuable ally in the past. In the 2004 presidential elections, Ms Arroyo won most of the votes in Maguindanao. In one town, her rivals did not get even a single vote.
Her office today vowed quick action against the killers. "We are shocked and in total outrage," Gabriel Claudio, the president's political adviser, said in a statement. "Justice will be served and the perpetrators punished whoever they are."
Earlier, military officials had said about 100 armed men, several of them in police uniform, had stopped the Mangudadatu convoy at a police checkpoint on a highway and taken the victims to a remote mountainous area.
The election process for the May 2010 national polls began last week registration for nearly 18,000 national and local positions. The campaign period begins in February for candidates running for president, vice president and 12 seats in the upper house of Congress.
For those seeking local positions and nearly 300 seats in the lower house of Congress, campaigning starts in late March. Polling is on May 10th.
Elections in the Philippines are usually marred by violence, especially in the south of the country, where security forces are battling communist rebels, Islamic radicals and fierce clan rivalries.
Reuters