Saudi Arabia has upgraded the launch sites built in the 1990s for its Chinese-built CSS-2 surface-to-surface missiles.
Recent satellite images examined by Israeli and US intelligence sources show many new buildings and indications of an improved command and control system at Saudi Arabia's largest CSS-2 facility at Al Sulaiyil, south of Riyadh.
In the images, 60 reinforced shelters to store the missiles are seen at Al Sulaiyil, recently visited by Chinese technicians. Saudi Arabia bought 120 CSS-2 (Dong-Feng 3) missiles and 12 fixed launchers from China.
The CSS-2 has a 2,500km (1,500 mile) range, is 24m (79ft) long and weighs 64,000kg (140,800lb).
Source: Flight International