Saudi officials say a Saudi soldier and two Yemenis have been killed in cross-border shooting and shelling by Yemen's Shiite rebels.

Interior Ministry spokesman Maj. Gen. Mansour al-Turki says a border guard died on Sunday in the southwestern region of Asir. He says Yemen's Shiite rebels, known as Houthis, opened fire and Saudi border guards fired back.

A statement from Saudi Civil Defense spokesman, Maj. Yahya bin Abdullah al-Qahtani, says that also on Sunday, two Yemenis died in Houthi shelling of the southern border province of Jizan.

Cross-border fire and shelling has been common since a Saudi-led coalition, which is backed by the United States, launched a campaign of airstrikes against Houthis in March.

Saudi, Emirati and other allied ground troops now are trying to retake Yemen's rebel-held capital, Sanaa.