What role does Saudi Arabia play in the fight against Yemeni opposition groups?

Headline: Saudi Arabia blamed for Yemen clashes Link: http://www.presstv.ir/detail.aspx?id=103612&sectionid=351020206 Story: Yemen’s oppositionists allege that a five-year-old military campaign launched against them has been orchestrated by Saudi Arabia. An opposition official, Yahya al-Houthi, said on Saturday that Saudi Arabia has gone so far as to deploy warplanes to Yemen to bomb opposition strongholds, Fars News reported. [...]