MANILA — Authorities are investigating armed groups that may be behind the shooting of Vice Mayor Mohammad Omar Abpi Samama of Datu Piang, Maguindanao del Sur, an official said Wednesday.

Board Member Mlok said the provincial candidate was from the proclamation rally of Team Agila political party in Datu Piang when ambushed. The ambush site was in Barangay Kiteb, Datu Anggal Midtimbang ...