by The Associated Press Last Updated May 20, 2021 at 2:09 pm ADT PANAMA CITY (AP) — Panama says it has closed its border with Colombia over concerns about the spread of COVID-19, but it wasn’t clear how it would enforce such a measure in the dense jungle-shrouded Darien region where smugglers operate and thousands of migrants have crossed this year on their journey north. The move came after Panamanian officials said Colombia had decided to open its border. “For Panama, that measure puts at the risk the significant advances achieved for all Panamanians to control the COVID-19 pandemic, as well as the border security and control of migrant flows,” Panama’s Foreign Relations Ministry said in a statement late Wednesday.