Colombia’s president has issued a decree giving him emergency powers to restore order in a coca-growing region bordering Venezuela that has been wracked in recent days by a deadly turf war among dissident rebel groups.

The Colombian border village of Tres Bocas has become a ghost town as residents flee to neighboring Venezuela to escape a new wave of violence that has left at least 80 people dead and displaced thousands in Colombia’s Catatumbo region.

Both the ELN and FARC-EMC have long fought for control over this drug-rich area, but recent violence marks a significant escalation.

Visa appointments at the U.S. Embassy in Colombia were canceled Monday following a dispute over deportation flights from the U.S. that nearly turned into a costly trade war between the two countries.

President Donald Trump on Sunday said the United States would impose wide-ranging sanctions and impose tariffs against Colombia over its refusal to accept U.S. military aircraft with migrants being deported.