Cartel gunmen used explosive drones to carry out an attack on Mexican policemen trying to clear blockades in the western state of Michoacan.

The case took place near the town of Aguililla this week after Michoacan Police officers worked to remove blockades along regional highways. Gunmen set the roadblocks approximately three months ago to keep rivals out of the area, El Financiero reported.

The roadblocks consisted of barricades, heavy machinery, and other large items, as well as ditches dug into the highway. Authorities were able to remove seven, however, gunmen flew drones carrying IEDs to launch an airstrike in the town of El Aguaje. According to the Michoacan Public Security Secretariat, two police officers sustained injuries.

Various Mexican news outlets claimed the Cartel Jalisco Nueva Generacion is responsible for the attack. The organization does have a history of using drones with IEDs.

However, law enforcement sources in Mexico tell Breitbart Texas the attack was in fact carried out by members of the Carteles Unidos alliance, which is made up of factions of La Familia, Los Viagras, and smaller groups fighting to keep control of Michoacan.

Ildefonso Ortiz is an award-winning journalist with Breitbart Texas. He co-founded Breitbart Texas’ Cartel Chronicles project with Brandon Darby and senior Breitbart management. You can follow him on Twitter and on Facebook. He can be contacted at Iortiz@breitbart.com

Brandon Darby is the managing director and editor-in-chief of Breitbart Texas. He co-founded Breitbart Texas’ Cartel Chronicles project with Ildefonso Ortiz and senior Breitbart management. Follow him on Twitter and Facebook. He can be contacted at bdarby@breitbart.com.