Photo courtesy of bp.blogspot.com

White widow Samantha Lewthwaite is 'alive and well' and living in southern Somalia with her jihadist husband, a wanted al-Qaeda suspect who calls himself Marco Costa, Kenyan sources said on Friday.

In a forged Mozambican passport obtained by MailOnline his picture clearly identifies him as Fahmi Jamal Salim who has been on the run from Kenyan police since he shot and killed two police officers in Nairobi in 2011.

Lewthwaite and Salim also appear in a 'selfie' taken at their home. Police are using these and pictures of their two children in a countrywide manhunt for the couple.

Counter-terrorism sources in Kenya revealed their updated profile of Lewthwaite in response to claims from a Moscow news agency earlier this week that she had been killed by sniper fire while fighting with a Ukrainian volunteer battalion against pro-Russian rebels.

Kenyan intelligence authorities are demanding to see Lewthwaite's body and say they refuse to believe she has been part of any militia outside East Africa.

A senior source said: 'We believe we currently have an accurate profile of Lewthwaite's life and location. She has been linked to other jihad suspects in the past but we now know that she is in a stable marriage with Salim and has two young children with him.

'They pose a major threat to security, working at a high level in the al-Shabaab terror group and planning bombing raids in Somalia and Kenya in retaliation for Kenya sending troops to Somalia to defeat al-Shabaab.'

By marrying Salim Samantha Lewthwaite has joined a family steeped in Muslim extremism and the jihad.

Lethwaite was linked to the Islamic terror group that carried out the Westgate shopping mall attack in Nairobi last year. The Muslim convert was also linked to a failed plot to blow up hotels and a shopping centre in Mombasa, in 2011.