Unclear if RSLAF Aviation Command or SANG Aviation Command. AFV at right possibly RSLF M60A3 main battle tank.
Houthi sources claim Apache downed by hostile action with crew fleeing scene. Upon query, Saudi Arabian source claims helicopter brought down by mechanical fault, with crew surviving.
Video evidence supports claim Houthi forces were on the scene, inside Saudi Arabian territory.
These actions reflect initiation of Houthi commander Ali al-Sham's public declaration of 24MAR15, to bring the war to Saudi Arabia should it intervene in the Yemen Civil War. (RSAF commenced airstrikes on Yemen the following day.)
Photo evidence from 06MAY15 of Najran under attack by Ansarullah or allied forces
Saudi Arabian security vehicle destroyed by shelling from Ansarullah or allied forces, 06MAY15 at Najran
COMMENTARY: These strikes by Ansarullah or allied forces reflect both an asymmetric response to the Saudi-led intervention in Yemen, as well as a probing for weak points with which to bring the war to within Saudi Arabian territory.