On Sept 16 the Yemeni Houthi movement said Saudi air force F-15s and Eurofighter Typhoons operating from Khamis Mushait and Taif bases have carried out more than 450 airstrikes since the start of the week across Taiz, Lahj, al-Jawf, Hajjah, Marib, Saada and Al Bayda provinces, causing civilian casualties. The statement said Houthi forces used a homemade surface-to-air missile to shoot down a Saudi F-15 over Marib that it said was supporting Saudi force concentrations.