Militant leader Tareq al-Dahab — a brother-in-law of US-born jihadist cleric Anwar al-Awlaqi who was killed in a US drone strike last September, sits in the Amiriyah mosque in the town of Rada, 130 kilometres (85 miles) southeast of the capital Sanaa, on January 18, 2012.
A Danish informant said that the British spy agency MI6 allegedly refused to kill Al Qaeda leader Anwar al-Awlaki because it was against the law.
Morten Storm, a former biker who was hired by MIA to infiltrate Al Qaeda, converted to Islam and dabbled with radical Islamists before turning into a spy for Western governments.
Storm, 36, says that after telling MI6 of al-Awlaki's whereabouts they refused to kill him, stating that they were an intelligence agency that does not involve itself with killings abroad, said the Daily Mail.
UPI reported that Storm was told that al-Awlaki did not threaten British lives and therefore they could not kill him.
Storm was said to be key in tracking down al-Awlaki by introducing the Al Qaeda leader to his future wife.
The Danish national has fallen out of favor with the spy agencies for revealing the plot, said CNN.
The CIA has maintained that it was not the intelligence given to them by Storm that led to al-Awlaki's killing but instead was a "parallel operation."
Storm is angry that he was not credited for the killing.
He said he came forward because he feared a CIA reprisal after the events.
The US and Europe believed that al-Awlaki was a major player in the terrorrist organization, inspiring the so-called "underwear bomber" and the 7/7 bus attacks in London.
Awlaki, an American citizen, was killed in a CIA drone strike in September 2011.
Storm has a checkered background with numerous criminal charges and drug use.
He is said to have converted to Islam in prison to escape a life of crime, reported the Telegraph.
He had his change of heart in 2006 and became a double agent for the Danish secret service, PET.
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