By Aaron Recuenco The Philippine National Police (PNP) advised yesterday concerned citizens who want to report vote-buying in their areas before and during the May 13 elections to preserve the pieces of evidence they have in order for the police to build a strong case. PNP spokesman Col. Bernard Banac said that the preservation of evidence includes the peso bill or bills which is or are usually attached to sample ballots. Another way, he said is to use the smartphones or any camera to take pictures or videos of the vote-buying activities. "We want to put a stop on this practice and a good way to start is to arrest and jail those who would dare engage in vote-buying," said Banac. So far, at least 12 people have been arrested-- 10 in Cavite and two in Quezon province. For those who do not want trouble or afraid to surface, Banac said they could immediately seek police assistance the moment they see vote-buying activities in their respective barangays. In this way, the police could immediately act and arrest the perpetrators while on the act of vote-buying, according to Banac. Banac said the police are mandated to immediately act on the report of vote-buying as part of the task to ensure a peaceful and credible election. In fact, he said almost 150,000 policemen will be deployed to render election duties. Part of it is to secure polling precincts and canvassing sites, and operations against security threats and reports of election cheating. The PNP will be augmented by the military which committed 70 percent of its strength, or some 98,000 soldiers, for election duties.