According to Nobleza, initial information showed that the improvised bomb was set off through a mobile phone.

Source: https://newsinfo.inquirer.net/1869861/bomb-blast-during-mass-kills-4-wounds-50-at-mindanao-state-university

Brig. Gen. Allan Nobleza, BARMM police director, said they would ensure that voters in the village would be able to cast their votes freely.

Source: https://newsinfo.inquirer.net/1851908/in-cotabato-city-police-officer-11-others-face-murder-raps-for-deaths-of-2-village-bets-supporter

Nobleza said some 10 heavily armed men fired at the troops before they could serve the search warrant, resulting to a firefight that lasted for about 25 minutes.

Source: https://www.mindanews.com/top-stories/2023/04/3-alleged-dawlah-islamiya-supporters-killed-in-lanao-7-others-arrested/