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 .
<response> <person>Misael Valerio</person> , head of border police at the <organization>Security Ministry</organization> , told reporters that surveillance of the country 's northern border with <location>Nicaragua</location> has been stepped up to stop the kidnappers from fleeing <location>Costa Rica</location> . </response>