On May 11, 2023, several personnel from the Office of the Senate Sergeant-at-Arms (OSAA) were summoned by the Philippine National Police - Criminal Investigation and Detection Group (PNP-CIDG) to provide testimony regarding a shooting incident that occurred during a Senate session. The incident escalated when Senator Ronald 'Bato' dela Rosa, who had recently reappeared amid rumors of an arrest order from the International Criminal Court (ICC), claimed that PNP-CIDG and National Bureau of Investigation (NBI) agents were attempting to arrest him. During the confrontation, OSAA personnel reported spotting two individuals believed to be NBI agents, who were armed and failed to comply with orders to lower their weapons. In response, Senate Sergeant-at-Arms Mao Aplasca fired a warning shot, leading to a chaotic exchange of gunfire. Senate security fired 27 shots, while the suspected NBI agents discharged five shots. Following the incident, NBI Director Melvin Matibag denied that agents were deployed to the Senate for any operation, clarifying they were instead stationed at a different location for security duties. This incident highlights ongoing tensions within the Philippine government regarding the controversial drug war policies.