MANILA, Philippines — The Bureau of Customs (BoC) said Sunday that it is set to investigate reports that the three oil tankers carrying more than a million liters of oil which sank off the coast of Bataan might be involved in smuggling.

Assistant Commissioner and concurrent BoC spokesman Vincent Philip Maronilla said that Commissioner Bienvenido Rubio gave marching orders to the bureau's intelligence group to intensify the drive against oil smuggling, particularly the so-called 'paihi (pee)' scheme, where oil is illegally siphoned off.