Fuerza Pública officers say they detained 13 persons in the country illegally during a sweep Sunday in Playas del Coco.
Officers also gave a long list of other cases, including the arrest of 20 persons for having drugs, fighting, robbery, theft and assaults, they said.
This is a continuation of the emphasis on the Pacific coast community after an Escazú man, Alejo Leiva Lachner, 21, was set upon by a mob and stabbed fatally in February.
Since April 1, a week after the murder, police said they questioned 12,643 persons and checked 3,678 motor vehicles and 1,114 motorcycles.
Sunday they confiscated 21 motor vehicles and 35 motorcycles for various reasons. They also said they found knives and a pistol.