SANAA
Yemen's Shiite Houthi group on Thursday threatened to turn Yemen into a "graveyard for invaders."
"The Yemeni people aren't an easy nut to crack," recently-appointed Houthi spokesman Sharaf Luqman said.
"We will settle scores with everybody, sooner or later, in whatever way the people see fit," he added at a press conference in Yemeni capital Sanaa.
Luqman was appointed as the Shiite Houthi group's official spokesman on Wednesday.
He said Houthi defenses were capable of turning Yemen's mountains and valleys into tombstones for those who invaded the country.
He called on the publics in countries participating in a Saudi-led air campaign against the Shiite group to pressure their governments to suspend what he called the "barbaric aggression" against the Yemeni people.
Yemen's Houthis to rally Friday against Saudi 'aggression'
Yemen's Shiite Houthi group has called for massive rallies on Friday to protest Saudi "aggression" against the Arab country.
In a Thursday statement, the Houthi Revolutionary Committee called on followers to take to the streets "to denounce this barbaric aggression against Yemen," according to the Houthi-controlled Yemeni news agency.
Fractious Yemen has remained in turmoil since last September, when the Houthis overran capital Sanaa, from which they have sought to extend their influence to other parts of the country.
On March 25, Saudi Arabia and several Arab allies began an air campaign targeting Houthi positions in Yemen.
Riyadh says its anti-Houthi offensive comes in response to appeals by Yemen's embattled president, Abd Rabbuh Mansour Hadi, for military intervention.
The Houthis, for their part, describe the Saudi-led offensive as unwarranted "Saudi-American aggression" against the Yemeni people.
Some Gulf States accuse Shiite Iran of supporting Yemen's Houthi insurgency.