The news that Interpol has issued a "Red Notice" for terror suspect Samantha Lewthwaite cements her status as the most wanted woman in the world.
The development is likely to lead to further shock and disbelief for the friends and family of the radicalised housewife in Banbridge, Co Down, where she used to live an unremarkable life.
According to Interpol, Lewthwaite - dubbed the "White Widow" - is wanted on charges of being in possession of explosives and conspiracy to commit a felony dating back to December 2011.
Speculation has been rife that the 29-year-old widow of a July 7 bomber was one of the masterminds behind the Nairobi atrocity which has claimed more than 70 lives.
The claims caused Lewthwaite's frail Northern Irlsh grandmother to be taken to hospital while those who knew her growing up in Aylesbury said they were "astonished and amazed" at the link.
Lewthwaite, who was married to suicide bomber Jermaine Lindsay, is the daughter of English soldier Andy Lewthwaite, who met and married Irish Catholic Christine Allen while serving in Northern Ireland during the 1970s.
She enjoyed an unremarkable childhood in Banbridge, Co Down, before moving to Aylesbury at a young age. In 1995 her parents split.
After converting to Islam at 17, Lewthwaite changed her name to Sherafiyah and married Lindsay, with the couple having three children together.
Lindsay went on to detonate the bomb at King's Cross tube station, killing 26 people in July 2005.
At the time Lewthwaite claimed to have been horrified by the killings but in 2009 disappeared with her three children and only resurfaced two years later after travelling to Kenya on a false passport.
Lewthwaite - who is believed to use the alias "Natalie Webb" - had previously only been wanted at national level for the possession of the fraudulently obtained South African passport.
Kenya's foreign minister, Amina Mohamed, fuelled further speculation by claiming a British woman who has allegedly been involved in terrorism "many times before" was among the militants who laid siege to the Westgate mall, leaving at least six Britons dead.
As Lewthwaite's global notoriety peaked, the shockwaves reached Banbridge, where Lewthwaite's grandmother, Elizabeth Allen, was taken to hospital.
Family friends said the pressure of the situation has taken its toll on the pensioner's health and mental well-being.
She had been given a panic alarm to contact security services in case the terror suspect made contact.
Joan Baird, a veteran Ulster Unionist councillor in Banbridge who knows the family, said: "This is so distressing for everyone. Mrs Allen is 85 and she is in and out of hospital. It is just so distressing."
In Aylesbury there was disbelief that the "average, British, young, ordinary girl" who was a "follower not a leader" could have gone on to mastermind extremist acts.
Councillor Raj Khan, who knew Lewthwaite socially, said she was "pleasant and courteous" and had a "very great personality", but lacked confidence.
"She was not strong-headed. And that's why I find it absolutely amazing that she is supposed to be the head of an international criminal terrorist organisation," Mr Khan said.
Niknam Hussain, a former mayor of Aylesbury and current chairman of the independent advisory group at Thames Valley Police, also knew Lewthwaite.
He said: "I'm astonished and amazed. I can't believe it's true in any which way.
"Until they provide us with proof, I think it's innocent until proven guilty, to be honest."
Mr Hussain also knew Lewthwaite's husband and described him as seeming "perfectly normal".
Those who were acquainted with Lewthwaite as a youngster insisted she was not linked in any way to the Jamia Ghausia Mosque or to the mainstream Muslim community in Aylesbury despite her desire to "learn Islam quite deeply".
She met Lindsay, a Jamaican-born Muslim convert who never made a secret of his extremist views, on an Islamic chatroom.
Brought up by his mother in Huddersfield, West Yorkshire, where he alarmed his teachers by attempting to radicalise impressionable younger pupils, he went on to kill 26 people travelling between King's Cross and Russell Square on the Piccadilly line.