Costa Rican authorities have arrested a suspect in the killing of a U.S. social worker who was found stabbed to death at a hotel in the Central American nation's capital.

The Costa Rican Public Ministry says the 27-year-old suspect apparently was involved in a romantic relationship with Minnesota native Sondra Lynn Elizondo.

Elizondo worked for Vida Volunteer of Merritt island, Florida, which organizes volunteer medical and veterinary missions in Central America. She was found dead last week in San Jose.

The Public Ministry said Wednesday that the suspect was detained Dec. 10 at a supermarket. Accompanied by a defense lawyer, he declined to make a statement. He was ordered to remain behind bars while authorities investigate.