President Rodrigo Duterte’s spokesman Salvador Panelo condemned the “act of terrorism” and vowed that government forces will pursue the perpetrators of the attack.
“The Armed Forces of the Philippines will rise to the challenge and crush these godless criminals,” he said.
In a separate statement, the Philippine Army said the explosions were likely caused by improvised explosive devices (IEDs).
“We condemn this dastardly attack on the civilians who were peacefully attending church services,” a statement from the military said.
The first blast that took place outside Jolo cathedral was followed by a second explosion just after emergency services arrived at the scene to treat the wounded, security officials reports media .
At least 21 people were killed and 48 others wounded in dual explosions, National Police Chief Oscar Albayalde said.