The Saudi-led Arab coalition said on Tuesday that it has carried out air strikes against "legitimate military targets" of the Iran-backed Houthi militias in Yemen's Sanaa.

The coalition said it struck a secret location for Iranian Revolutionary Guards (IRGC) experts in Sanaa.

It also destroyed a location that was used to store and build ballistic missiles inside the Houthi-held capital city.

The coalition called on civilians against gathering close to or approaching the targeted areas.

Tuesday's operation is in line with international humanitarian law, stressed the coalition.

Earlier this month, the coalition had warned that Sanaa International Airport has been transformed by the Houthis into a military base for their operations and those of the IRGC and Hezbollah party.

On Sunday, the coalition said the Houthis were exploiting areas that enjoy legal immunity to carry out cross-border attacks.

It vowed to take the necessary legal measures to drop this immunity if required in order to protect civilians.