Yesterday witnessed at least the eighth Saudi oil tanker attacked by the Houthis since the maritime blockade began on July 22, which is being followed by reports the Yemeni rebel group backed by Iran could be preparing for all-out war with Saudi Arabia.The group struck two Saudi oil tankers in the Red Sea on Wednesday and coupled the action with a threat to intensify attacks in order to close "all access routes" to Saudi oil shipments. Military spokesman Brig. Gen. Yahya Saree confirmed that ballistic missiles were launched at a Saudi tanker called Wafa near the Saudi port city of Yanbu.A second oil tanker identified as Daisy was subsequently hit in the Gulf of Aden with a ballistic missile and "forced to turn back" - the spokesman said in a social media post. The Houthis are dubbing it a "blockade for blockade" strategy.via AFPBut it seems the Saudis aren't ready to take this laying down, even if the ratcheting Red Sea region conflict threatens fragile Oman-sponsored talks to reopen the Strait of Hormuz, as on Thursday its proxy the Yemeni Armed Forces - representing the official government whose seat is in Aden in the south - announced preparations for a large new military operation.This as Al Arabiya reports a fresh outbreak of ground fighting, in a renewal and intensification of the civil war that goes back to at least 2015 (and has an international proxy war aspect to it). The Arab publication says that a Houthi attack killed 45 government forces in Hadramawt and Marib in Yemen, areas which also happen to be home to the vast majority of the country's oil and gas fields.Separately Al Jazeera describes of the same event:The Yemeni Emergency Forces of the internationally-recognised government, have said that there have been material and human losses following attacks on its camps.Several causalities have been reported after a suspected Houthi rocket and drone attack targeted bases hosting the forces in Marib and Hadramaut.So now it seems that even if a grand Hormuz deal to reopen energy transit can be pulled off with some level of sticking power, there will have to be a separate ceasefire to contain the Yemen and Bab al-Mandab Strait crisis.To some degree, the Houthi closure of the Red Sea to Saudi shipping represents a good cop, bad cop approach to the United States and its Gulf allies. It is a way for Tehran to still maintain some serious tangential leverage over global energy, even as ships in Hormuz could finally get moving again.The Houthis launched ballistic missile and drone strikes on Saudi-backed Yemeni forces in Marib Governorate, targeting several military sites.