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 in Colombia’s Catatumbo region that has left at least 80 people dead and displaced thousands.

Colombia called on neighboring Venezuela Thursday to help tackle guerrillas blamed for a week of bloody violence that has displaced 40,000 people in the lawless border region.

Venezuela sent Russian-made military jets to patrol its border as tens of thousands fled the most intense outbreak of violence in Colombia since its 2016 peace deal.