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Smoke rises from a government building in Al Houta, the provincial capital of Yemen's southern Lahej province March 21, 2015 Image Credit: AFP

ADEN: The United States said it had evacuated all its staff from Yemen, whose embattled president has appealed for "urgent intervention" by the UN Security Council as attacks by Iran-backed Al Houthis bring his country nearer to civil war.

"Due to the deteriorating security situation in Yemen, the US government has temporarily relocated its remaining personnel out of Yemen," State Department spokesman Jeff Rathke said in a statement.

The evacuation comes after several suicide bombings claimed by Daesh killed 142 people in Sana’a on Friday, with the militants seeking to exploit the chaos gripping the country.

The impoverished nation is torn between a north controlled by Al Houthis and a south dominated by allies of President Abd Rabbo Mansour Hadi, who fled house arrest in Sana’a to Aden in February.

The UN Security Council is to hold an emergency meeting Sunday following Hadi's appeal.

In his letter to the Council, Hadi denounced "the criminal acts of the Huthi militias and their allies," saying they "not only threaten peace in Yemen but the regional and international peace and security."

"I urge for your urgent intervention in all available means to stop this aggression that is aimed at undermining the legitimate authority, the fragmentation of Yemen and its peace and stability," Hadi wrote.

Yemen has been torn by unrest since ex-strongman Ali Abdullah Saleh stepped down in early 2012 after a year-long popular uprising against him, with powerful armed groups side-lining the government since.

The country is now on the brink of civil war, with a deepening political impasse and an increasingly explicit territorial division along sectarian lines.