On the eve of election day, Southern Tagalog regional poll-watchdog Kontra Daya, Kontra Karahasan received reports of election-related violence against militant groups in the region. In Los Baños, Laguna, at around 12:30 mn, 3 members of Kabataan Partylist, a member of Bayan Muna Partylist and Barangay Human Rights Officer Virgilio Tandang were arrested and physically injured by alleged Makati police officers while in a mass-action of residents against the alleged vote-buying and flying-voter scheme of a mayoral candidate.