A few days ago 5 Saudi soldiers were killed in Jizan..It might be related..
Jizan is a very mountainous region close to Yemen.. which make it easier for Houthis to cross borders through mountains or fire missiles from their own mountainous side..
Seriously you guys should step up weapons supply, not like the crappy ballistic missiles they were firing that get shot down midair without hitting target. Those trash from the desert should get their *** spanked properly.