Lt. Col. Benjamin Hao, spokesman of the Army's 6th Infantry Division, said the suspects were apprehended by military and police forces on separate occasions in North Cotabato Province and Cotabato City on Friday and on Saturday.
The suspects were 15-year-old Piko Tnagkulo; Ibrahim Alimanan, alias Siang Ulama; Alex Samal, Yazer Talusiog; and Abdulh Alib Talusog, who are all under the custody of the North Cotabato provincial police office at present.
First to fall was Tnagkulo who was nabbed by elements of the North Cotabato provincial police office on Friday in the province. Hao could not however say the other circumstances of the arrest of Tnagkulo.
During questioning, Tnagkulo implicated the four other suspects who were nabbed by elements of the Army's Task Force Tugis and police forces around 12:30 p.m. Saturday along Sheriff st., Barangay Rosary Heights in Cotabato City.
"The latter (Tnagkulo) revealed his companions in the said bombing operation who are present in Cotabato City ... He provided the names, gave us the lead, prompting the operations in Cotabato City," said Hao.
Officials have earlier surmised that the extortion group Alcobar could be responsible for the detonation of the improvised bomb inside the bus which was in transit and on the way to Tacurong City from Cagayan de Oro City.
When asked for the group affiliation of the arrested suspects, Hao said: "We are not yet certain ... We are still checking."
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