In raids that began on June 2, security and paramilitary forces have arrested five opposition presidential challengers as well as journalists, businessmen and a banker.
The Minister of Public Works and Transportation of Costa Rica, Rodolfo Méndez, became one of those investigated in an alleged bribery scandal between construction companies and the government
All four are critics of Nicaragua's authoritarian President Daniel Ortega and have been detained in recent days in an expanding crackdown on dissenting voices.
Costa Rica's coronavirus R value remains below one, suggesting that the number of new infections will continue to decrease, according to analysis from the University of Costa Rica (UCR).