A man Fuerza Pública officers said reeked of alcohol tried to make off with an ambulance while paramedics were busy on a house call nearby.
Police said they stopped the man some 300 meters from where the ambulance was stopped. They could not determine a motive.
However, they said they also detained a relative who was following the ambulance in a private car.
The incident took place Wednesday morning near the Cementerio General in the central canton of Cartago.