Landmines and kidnappers
The town was destroyed by the war between Mauritania and Morocco. This has left many people poor. Hence they kidnap the tourists for money. Also, there are many landmines just outside the city near the border. Hence, donot wander around.
there are lots of land mines on your way to the moroccan wall. dont go off the road. Of course saying "dont go out of the road" its quite easy, but in reality, the road is completely destroyed and you need to go out to the sand...