Saudi-led coalition warplanes has struck the house of a Houthi leader in Yemen's central Ibb province on Saturday, eyewitnesses have said.

"Warplanes fired missiles into the house of Abdel-Qadir al-Shami in Sawada village," an eyewitness told Anadolu Agency.

Plumes of smoke were seen billowing from the building following the attack.

No information is yet available about casualties.

Saudi Arabia has stepped up attacks on Houthi sites since Friday, striking several positions of the Shiite group in the northern Saada province.

On Thursday, Saudi Arabia vowed to deliver a "harsh" response to what it described as recent Houthi "assaults" on Saudi territory.

The threat came after ten Saudis were killed by artillery shells originating from neighboring Yemen.

Since late March, Saudi Arabia and several of its Arab allies have been pounding Houthi positions across Yemen.

Riyadh says its air campaign is in response to appeals by Yemen's embattled president, Abd Rabbuh Mansour Hadi, for military intervention against the Houthis.

Last September, the Shiite group overran capital Sanaa before advancing southward on other parts of the country.