TEHRAN, Young Journalists Club (YJC) - The explosion occurred in front of a clothing stall along a highway in Isulan in Sultan Kudarat province, where a festival was taking place.
An investigation is underway.
There were no immediate claims of responsibility, according to police.
The province is on the Philippines' second-largest island, Mindanao, parts of which have been plagued by decades of Maoist and separatist rebellions that have given rise to banditry and the influence of Daesh group.
Source: Reuters