At least 27 people were killed and 77 others injured on Sunday in twin explosions during Mass at a church in Philippines' Sulu province, police said.
A senior police officer told the media that the blasts hit the Jolo Cathedral at 8. 15 a. m. , reports Xinhua news agency.
Philippine National Police (PNP) Director General Oscar Albayalde said the explosions were caused by improvised explosive devices (IEDs).
He said onewent off inside the church while athe second one near its entrance.
"It went off one minute apart, " Albayalde said.
"We strongly condemn this atrocious act of taking the human lives for whatever purpose the perpetrators may have.