text: Dutch couple kidnapped in Costa Rica . SAN JOSE , Costa Rica 1996-08-26 A Dutch couple who manage a farm in northern Costa Rica have been kidnapped by an unidentified group demanding $ 1.5 million in ransom , authorities said on Monday . Officials said Humberto Hueite Zyrecha and his wife Jetty Kors , both 50 , were kidnapped late Saturday or early Sunday . Col . Misael Valerio , head of border police at the Security Ministry , told reporters that surveillance of the country 's northern border with Nicaragua has been stepped up to stop the kidnappers from fleeing Costa Rica . No other details were immediately available .