The San Juan River provides a border between Nicaragua and Costa Rica

Costa Rica and Nicaragua have been bickering over the border area since October 2010, when Costa Rica complained about Nicaragua’s dredging of the San Juan river, a point that acts as a natural limit between the two countries. In January 2011, Nicaraguan troops occupied a border area called Isla Calero in an event Costa Rica characterized as an 'armed invasion.'

Costa Rican Foreign Minister Enrique Castillo on Tuesday reported “aggression in our territory and against our sovereignty by Nicaragua” at the General Assembly of the Organization of American States (OAS) held in Bolivia.

Castillo said that “the dispute with Nicaragua not only remains active but has been exacerbated over time.” He also mentioned the OAS decision in 2010 in which members supported a proposal by the secretary general “for Nicaragua to withdraw its troops from Costa Rican territory, which Nicaragua has disrespected.”

From the Tico Times