Saudi forces intercepted seven Yemeni rebel missiles on Sunday, including over the capital Riyadh, in a deadly escalation on the eve of the third anniversary of the Saudi-led coalition's intervention in Yemen.

A suicide bombing claimed by the Islamic State group hit UAE-trained Yemeni troops in the government bastion of Aden on Tuesday, killing six people -- including a child -- and wounding dozens.

At least 30 African migrants drowned when their boat capsized off war-torn Yemen this week with reports of gunfire being used against those on board, the United Nations said Friday.

The Saudi-led coalition conducted multiple air raids in Yemen on Wednesday, a day after Huthi rebels fired a ballistic missile at Riyadh in an attack Washington said was enabled by Iran.

Saudi Arabia said it shot down a ballistic missile Tuesday over Riyadh fired from Yemen by Iran-backed Huthi rebels, who announced that the target was the official residence of King Salman.

Saudi-led air strikes on a prison run by rebels in Yemen killed 30 people and wounded 80 on Wednesday, the rebels' Al-Masirah TV reported.

Fresh gun battles forced shops and schools to close in Yemen's capital Sanaa on Sunday as residents warned a three-year rebel alliance was collapsing into a "street war".

Ten suspected Al-Qaeda members in southern Yemen were killed in drone strikes over the weekend, government officials said Monday, as raids targeting the radical group intensify.

A UN plane carrying desperately needed vaccines landed in the rebel-held Yemeni capital Sanaa on Saturday after a three-week Saudi-led aid blockade that had sparked warnings thousands could die.

Yemeni forces ended a hostage crisis Monday with 29 police and six civilians dead, a day after the attack claimed by the Islamic State group began with suicide bombings, official sources said.

Suspected Al-Qaeda militants staged twin suicide bombings and took hostages Sunday in Aden, officials said, striking at the heart of the Yemeni government after suffering a string of setbacks.

The Saudi Arabia-led coalition fighting in Yemen was Thursday placed on a UN blacklist for killing and maiming children, drawing fresh calls from rights groups to step up pressure on Riyadh over the conflict.