■ Bombers killed at least 20 people at a Palm Sunday Mass in Indonesia.

MAKASSAR, Indonesia — Two attackers believed to be members of a militant network that pledged allegiance to the Islamic State group blew themselves up outside a packed Roman Catholic cathedral on Indonesia’s Sulawesi island, wounding at least 20 people, police said.

Rev. Wilhelmus Tulak, a priest at the Sacred Heart of Jesus Cathedralin ma kass ar, said he had just finished celebrating Palm Sunday Mass when a bang shocked his congregation. He said the blast went off about 10:30 a.m. as a first batch of churchgoers was walking out of the church and another group was coming in.

He said security guard sat the church were suspicious of two men on a motorcycle who wanted to enter the building and when they went to confront them, one of the men detonated his explosives.

Police later said both attackers were killed instantly, and evidence collected at the scene indicated one was a woman. The wounded included four guards and several churchgoers, police said.

National Police Chief Gen. Listyo Sigit Prabowo told reporters when he visited the crime scene late Sunday that the attackers are believed to have been members of the militant group Jemaah Anshorut Daulah, which has pledged allegiance to the Islamic State group and was responsible for deadly suicide bombings on Indonesian churches in 2018.

He said one of the attackers was believed to have links to a church bombing in the Philippines.

The attack a week before Easter in the world’s most populous Muslim-majority nation came as the country was on high alert following December’s arrest of the leader of the Southeast Asian militant group, Jemaah Islamiyah, which has been designated a terrorist group by many nations.