Fighting between Shiite rebels and loyalists killed dozens across Yemen Tuesday.
A Saudi-led coalition carried out air strikes for a seventh straight day since announcing a halt to its aerial campaign, an AFP correspondent and witnesses said.
They destroyed the rebel-held Sanaa airport runway after an Iranian plane “defied” a blockade on Yemeni airspace and its pilot dismissed calls to land at a Saudi airport to be searched, coalition spokesman Brigadier General Ahmed al-Assiri told Al-Arabiya news channel.
This showed there was “something not right” about the plane, he said, denouncing “irresponsible actions” in “defiance of blockade measures”.
On Tuesday, at least 70 people were killed in fighting between the Iran-backed rebels and pro-government forces in several parts of Yemen, sources said.
Iran’s Revolutionary Guards chief General Mohammad Ali Jafari said on Monday that Saudi Arabia was verging on collapse and accused it of following “in the footsteps of Israel and the Zionists” by bombing Yemen, the Arab world’s poorest state.
A Sanaa airport official told AFP coalition warplanes bombed Sanaa airport on Tuesday afternoon after three planes carrying aid landed at the facility in the morning.
Assiri confirmed that aircraft carrying aid from Doctors Without Borders, the International Migration Organization and other aid groups had landed in Sanaa Tuesday.
But with the runway now destroyed, there can be no further aid flights until it is repaired by the rebels who control the airport, as well as the capital itself.

Witnesses reported other strikes on the rebels and their allies in oil-rich Marib province, east of the capital, around third city Taez and in the Red Sea port of Hodeida.
In the adjacent province of Lahj, 14 rebels and 11 Hadi loyalists were killed in battles for the coast road linking Aden to the strategic Bab al-Mandab strait, military sources said.
Farther northeast in Marib, 17 rebels and two pro-Hadi fighters were killed, tribal and medical sources said.
In Abyan, another southern province, six rebels were killed in two attacks on their positions, an official said.
The United Nations says more than 1,000 people have been killed in fighting in Yemen since late March, when Riyadh assembled the coalition in support of Hadi.