Yemen border being fenced

Saudi Arabia is tightening security along its southern border with Yemen by building a 1,800 km fence, spanning from the Red Sea coast to the border with Oman.
Standing three meters high, the fence will consist of a network of sandbags and pipelines, fitted with electronic detection systems.
The Kingdom began constructing the fence in 2003, but stopped in 2004 after protests from the Yemeni government. Yemen cited a 2000 border treaty between the two countries that clearly delineated the dividing line.
The first section of the fence has already been built along the coast, halting the flow of illegal immigrants, but the border remains a dangerous zone.
Tightening security along the border with its southern neighbor has become more urgent for the Kingdom after the Yemeni revolution in 2012 and the subsequent turmoil afflicting the country. Yemen has extremists within its borders.