Six months ago, traveling to Monclova, between Saltillo and Piedras Negras, we were passed on the highway by many Fuerza Coahilla on the highway. Several Motorcycle officers and many cars afterwards. All with warning lights going off.
Don't know what that was about, but guess is they just were breaking the speed limit and had the authority.
Entering Monclova, they arrested someone immediately. At the traffic light, a man twirled burning swords.