Residents of Pitahaya de Puntarenas, upset over the condition of a local road, blocked the Interamericana Norte from 1 p.m. to 4 p.m. Friday.
When police tried to break up the blockade, they were met with a shower of rocks and others objects. Three police officers sustained injuries, said the Fuerza Pública. Two residents were detained, officers said.
One officers who was hit square in the mouth required treatment at a hospital, officers said.