A U.S. spotter aircraft crew alerted Costa Rican authorities Friday morning to the presence of a small boat heading toward Limón.
The Servicio Nacional de Guardacostas and the Servicio de Vigilancia Aérea responded, but the small boat fled into Panamanian waters, said the security ministry.
However, the crew of the small boat dumped packages of marijuana into the sea, which were collected by Costa Rican law officers, the ministry said.
The action took place about 40 miles east of the Caribbean coast. Officials said that bad weather kept officials from following the small boat.