The leader of Yemen's Iranian-allied Houthi militia accused Saudi Arabia on Sunday of plotting to seize the country, in a fiery speech suggesting he was in no mood to compromise despite more than three weeks of Saudi-led bombing.

Saudi Arabia's goal is "the invasion of this country, its occupation and placing this country again under its feet and hegemony," Abdel-Malek al-Houthi said.

"It's the right of our people to resist the aggression and face the aggressor by any means," he added.