Houthi fighters opposed to Yemen's president took over the central city of Taiz in an escalation of a power struggle that diplomats say risks drawing in neighboring oil giant Saudi Arabia and its main regional rival, Iran.
Abdel-Malek al-Houthi, head of the powerful Shiite Muslim group, vowed to pursue Sunni militants behind suicide attacks on Houthi supporters and said the poor Arabian peninsula country was in danger of descending into Libya-style turmoil.
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