Three soldiers were killed when BIFM fighters set off a roadside bomb as a military truck drove past in the Datu Piang region of Maguindanao.
Later, two other soldiers died in a skirmish with BIFM fighters in the town of Pikit in North Cotabaco .
A BIFM spokesman confirmed that his group was behind the attacks and will continue similar offensives until the military leave Maguindanao.
BIFM was formed by Ameril Umbrakato, a former senior member of the Moro Islamic Liberation Front (MILF).
The BIMF attacks occurred two days before the scheduled day for Philippine government and MILF to resume talks in Malaysia .
MILF has waged a guerrilla war for a separate Islamic state in Mindanao since the 1970s.-VNA