Mexican cartels are believed to have torched several commercial trucks waiting in traffic at the Pharr-Reynosa International Bridge in South Texas in an attempt to end the dayslong closure of the border crossing.

Cartel members on Wednesday afternoon ignited four tractor-trailers that were parked on the side of the northbound entrance onto the bridge, according to a report. Flames and black smoke stretched into the sky, and firefighters responded to the scene.