Authorities have issued an urgent warning for travelers crossing the border between the U.S and Mexico after cartels reportedly place explosives along roadways.

Mexican drug cartels are ordering their members to attack US Border Patrol agents with kamikaze drones and other explosives in a desperate bid to thwart the crackdown at the border, according to an internal memo obtained by The Post.

Federal agents working the border are also advised to "carry proper equipment" at all times, including first-aid kids, tourniquets and body armor. The memo also notes that rifles "should be readily available.