Samantha Lewthwaite, described as the world's most wanted woman, has got married to a commander of one of the world's most feared terror groups.

Lewthwaite, dubbed the White Widow, is said to have got married for the third time to Hassan Maalim Ibrahim, also known as Sheikh Hassan, a senior commander in terrorist organisation al-Shabaab.

Islamist militant group al-Shabab are thought to have links with al-Qaida and were behind the attack on the Nairobi's Westgate shopping centre in Kenya in 2013, in which 68 people were killed.

Intelligence sources say Lewthwaite's marriage to Ibrahim will provide her with better protection while she is on the run suspected of a series of terror attacks in Kenya.

She has also reportedly ditched her group of elite al-Qaida fighters – known as the Istishhadyin unit, or suicide squad - who had been protecting Lewthwaite while she hid in Somalia.

Eyewitnesses claim they spotted Lewthwaite and Ibrahim in a village 25 miles away from the Somali city of Baidoa, where she was also sighted last November.

A senior security insider told the Daily Mirror: "Her in-laws will treat her very well as she is now one of them and part of one of the large clans.

"Samantha is in a heavily-guarded village in a no-go area for outsiders.

"But we're sure she'll move around which is why she needs to get in with the family.

"She wears black socks and gloves and hijab to cover her white skin so spies won't see her.

"Samantha has given herself great protection with this marriage."

The mother-of-four was already married to 7/7 Kings Cross bomber Germaine Lindsay and also believed to have been married to former Kenyan terrorist Abdi Wahid.

Lewthwaite has been on the run for the past three years after she was arrested accused of planning a bomb attack in Mombasa with fellow British accomplice Jermaine Grant in December 2011. It was reported she had fled over the border from Kenya to Somalia in March 2012.

She was dubbed the world's most wanted woman after being linked to the Nairobi shopping mall massacre and is reported to have escaped from an al-Qaida training camp after it was bombed by Kenyan forces earlier this year.