Saudi Arabia has inaugurated a multilayered fence along its northern borders, as part of efforts to secure the kingdom's vast desert frontiers against infiltrators and smugglers, state media said.
King Abdullah announced late Friday the launch of the first stage of a border security programme, covering 900 kilometres (560 miles) of the northern frontier, SPA state news agency reported.
SPA did not name Iraq, Saudi Arabia's neighbour to the north, referring only to the northern frontier, but the two countries' common border stretches over 800 kilometres (500 miles).
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But with increased worries over infiltration by anti-government militants and Al-Qaeda, the Saudi interior ministry expanded the scope of the programme to fence and electronically monitor all the country's borders.

http://afp.omni.se/41680169-f03d-41b3-ba7a-bc1ce5e8feb1

Saudi unveils 900km fence on Iraq border
http://www.aljazeera.com/news/middleeast/2014/09/saudi-unveils-900km-fence-along-iraq-border-201496154458789238.html