This developed as Superintendent Arturo Tolentino, Rizal police director, has ordered the setting up of checkpoints in strategic areas in the province amid a series of bomb threats last weekend.
Probers are now looking into the business rivalry angle for the bomb explosion outside the Rempson Supermarket, which injured two firefighters and destroyed an estimated P1 million worth of property.
Police found no evidence against two foreigners earlier arrested for the blast. – Non Alquitran