A judicial source who requested anonymity told UPI Monday that Yemen will make a new attempt to win al-Masri's extradition "in light of new British laws allowing the eviction of extremists deemed to pose a threat to British security."
Britain introduced the strict immigration laws after the July 7 London bombings, which killed more than 50 people and injured some 200 others.
Yemeni authorities are preparing a file containing evidence of al-Masri's involvement in terrorist attacks in Yemen, and are promising to give him a fair trial, the source said.
Among the charges against al-Masri is supporting extremist groups such as the Islamic Army of Aden, which is accused of kidnapping foreigners and of conspiring to attack vital national interests.
Al-Masri has been condemned by many Muslims as too extreme. He defiantly justified the Sept. 11, 2001, terror attacks on New York and Washington.
He was born Mustafa Kamel Mustafa in Alexandria, Egypt, to middle-class parents. In 1979, he came to London with plans to become a civil engineer.