Philippine military officials say suspected militants from a breakaway Muslim rebel group have set off bombs in two southern provinces in their latest assault.
No-one was injured in the latest reported incident by gunmen who went on a rampage last week, sparking clashes that killed at least 28 people.
The officials say hundreds of soldiers have forced armed fighters of the Bangsamoro Islamic Freedom Movement out of two strongholds in southern Maguindanao province and were pursuing them on Sunday, mostly in hinterland areas.
They say at least seven home-made bombs have exploded in recent days along roads and in communities in Maguindanao and nearby North Cotabato province, in an apparent attempt by the breakaway rebels to disrupt army assaults.
The fighting has displaced 39,000 villagers.