Five suspected Abu Sayyaf militants accused of involvement in a deadly suicide attack at a Roman Catholic cathedral in the southern Philippines have surrendered to authorities, the national police chief said Monday amid renewed terrorism fears.

Complaints for murder and attempted murder were filed against the five, as well as several other suspected Abu Sayyaf fighters who remain at large, for their alleged role in the Jan. 27 attack at Our Lady of Mount Carmel Cathedral in Sulu province’s Jolo town which killed 23 people and wounded nearly 100 others.

Before the bombing, the detained suspects escorted two Indonesians thought to have carried out the suicide attack around Jolo and to a meeting with an Abu Sayyaf commander, Hatib Hajan Sawadjaan, who has been accused of planning and funding the attack, police Director-General Oscar Albayalde said.

Read more: Washington Post