Two homemade bombs exploded outside a drug store and an electric cooperative in a southern Philippine province, wounding five people, police said Friday.
The attacks occurred Thursday evening in Isulan town in Sultan Kudarat province, 960 kilometres south of Manila, according to Chief Inspector Romel Sermese, town police director.
Sermese said the first bomb exploded outside the Mercury Drug store, injuring five people, dpa reported.
Minutes later, the second explosion rocked the Sultan Kudarat Electric Cooperative, but no one was hurt, he added.
Authorities were still determining who was behind the bombing.
Sermese said the attacks could have been a "diversionary action" by Muslim separatist rebels in a bid to ease military offensives against them in nearby Maguindanao province.
Investigators are also looking into the possibility that the attacks were perpetrated by an extortion gang, known to harass businesses in southern provinces.