By Federico Maccioni, Timour Azhari and Eman Abouhassira

RIYADH, July 25 (Reuters) - Yemen's Iran-aligned Houthi militants fired on Saudi oil installations in two ports on the Red Sea coast on Saturday and Saudi-backed forces bombed the Houthis, as the war in the Gulf that has disrupted global supplies extended to a second front.

Houthi military spokesperson Yahya Saree said the group had targeted and successfully struck sites belonging to Saudi state oil giant Aramco in Jizan and Yanbu.