Three men and a woman have been detained on suspicion of being the culprits in a series of at least 40 robberies in Guanacaste beach communities.
The Judicial Investigating Organization said that the investigating began in December. Crimes were reported in Playas del Coco, Playa Hermosa and Playa Panamá, the agency said.
Many of the victims were foreigners, said the judicial police. The gang of robbers usually worked at night and entered homes where there usually was just one person.
The arrests were made during morning raids in the Liberia area.