The Yemeni government is pointing the finger at Shiite Houthi fighters for an air strike on a camp for refugees in northern Yemen that has killed at least 40 people.
Yemeni foreign minister Riyadh Yaseen has made the suggestion while speaking in-exile from Saudi Arabia.
He has denied suggestions it was Saudi jets which fired on the refugee camp.
"This is really untrue, they are always trying to have what is called a human shield. Houthis they are going to places where there is some population or residential houses and they are trying to put their weapons there."
Yemen's state news agency Saba, which is currently under the control of the Houthis, says the camp was hit by Saudi planes.
Meanwhile, the Yemeni government in-exile is accusing Iran of sending its elite Revolutionary Guards troops into Yemen.
Saudi Arabia, supported by its Sunni Muslim allies in the region, began launching air strikes last week against the Houthis, which now control much of Yemen.
The Saudi-led coalition says it has full control of all of Yemen's sea ports.
The coalition forces are now said to be focusing on slowing down the Houthi march towards the southern Yemeni city of Aden.
