One can't really say with anything with something like 100% guarantee about this conflict, then both... nah: ALL sides involved are meanwhile lying so much.

Anyway: yes, the Iranians claim that Houthis and YA units still loyal to them (that would make the latter one of three brigades of the Missile Force), have hit RSNG base in Najran.

...and Saudis claim to have intercepted that missile, and then found the TEL and that fired the missile and killed it too.

But then, that's meanwhile a kind of 'standard' claim by both sides: this must've been something like 40th (claimed) interceptions so far, and if - then usually this is done by Saudi PAC-3s. Only thing they change in their releases is the target.

BTW, note that Iranians claim the 'Houthis' have 'sunk nine Saudi warships' too. Now, it does seem that the YA's missile force has got a few Iranian-made and truck-mounted C.802s, no doubt about this. But, the 'video-evidence' they're showing for latest such attack is a video of a USN training shot...