COTABATO CITY - At least five persons were killed in an ambush along the national highway in Barangay Dulangan, Datu Odin Sinsuat (DOS), Maguidanao Monday afternoon, police said.Senior Inspector Lindsy Sinsuat, DOS town police chief, said the ambush happened at about 4:30 p.m. He said the report was sketchy.In his FB posts,Cotabato City Councilor Bruce Matabalao said one of the victims wasHadja Bai Lilang Ayunan, his aunt.The identities of the other victims were not yet available as of posting. Policeinvestigation is still going on.