As Cicero was walking down a dark alley one midnight, he saw an "owner-type jeepney" approaching him. Sensing that the occupants of the vehicle were up to no good, he darted into a corner and ran. The occupants of the vehicle − elements from the Western Police District − gave chase and apprehended him. The police apprehended Cicero, frisked him and found a sachet of 0.09 gram of shabu tucked in his waist and a Swiss knife in his secret pocket, and detained him thereafter. Is the arrest and body-search legal? (3%)