Tumu is a border checkpoint

Border checkpoint

A border checkpoint is a place, generally between two countries, where travellers and/or goods are inspected. Authorization often is required to enter a country through its borders. Access-controlled borders often have a limited number of checkpoints where they can be crossed without legal...

 in Libya

Libya

Libya is an African country in the Maghreb region of North Africa bordered by the Mediterranean Sea to the north, Egypt to the east, Sudan to the southeast, Chad and Niger to the south, and Algeria and Tunisia to the west....

 at the Libya–Niger

Niger

Niger , officially named the Republic of Niger, is a landlocked country in Western Africa, named after the Niger River. It borders Nigeria and Benin to the south, Burkina Faso and Mali to the west, Algeria and Libya to the north and Chad to the east...

 border in the Murzuq District. It is 310 kilometres south of Qatrun, the closest Libyan settlement on the desert road. Tumu consists of little more than a few government shack

Shack

A shack is a type of small house, usually in a state of disrepair. The word may derive from the Nahuatl word xacalli or "adobe house" by way of Mexican Spanish xacal/jacal, which has the same meaning as "shack". It was a common usage among people of Mexican ancestry throughout the U.S...

s, and the border checkpoint is frequently closed, which requires travellers crossing from Niger to report at Qatrun.