The United States said it had evacuated all its staff from Yemen, whose resigned president has appealed for "urgent intervention" by the UN Security Council.

The United States said it had evacuated all its staff from Yemen, whose resigned president has appealed for "urgent intervention" by the UN Security Council.

"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 the so-called 'Islamic State of Iraq and the Levant' (ISIL) takfiri group killed 142 worshippers in Sanaa on Friday.

The UN Security Council is to hold an emergency meeting Sunday following appeal by incumbent President Abed Rabbu Mansour Hadi.

In his letter to the Council, Hadi denounced "the criminal acts," 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-President Ali Abdullah Saleh stepped down in early 2012 after a year-long popular uprising against him, with powerful armed groups sidelining the government since.

Washington late Friday pulled out troops from the Al-Anad airbase in southern Yemen amid fighting involving Al-Qaeda militants nearby which left at least 29 dead.

Ansarullah group, also dubbed as Houthis, has liberated the capital Sanaa from al-Qaeda operatives last September, and worked to restore security and stability in the attack-hit areas.
The powerful group issued the Constitutional Declaration, in a bid to avoid the power vacuum in the country following the resignation of Hadi and his prime minister.
The Huthis vowed to take further "revolutionary steps" following Friday's blasts.