The trial of a British terror suspect has been temporarily halted after Samantha Lewthwaite, otherwise known as the White Widow, threatened to kill 10 of the witnesses.

Lawyers at the trial of Jermaine Grant told how witnesses asked to give evidence were "in fear for their lives" following the threats by Lewthwaite. It is not known how she delivered the messages.

Grant, an accomplice of Lewthwaite, is on trial in Kenya accused of plotting to kill hundreds of people in a bomb attack on a shopping mall and hotels in Kenya.

A security source told the Daily Mirror: "Lewthwaite is behind the intimidation of witnesses in the trial of Jermaine Grant. We believe it is a crude attempt to force the prosecution to abandon the trial of her accomplice."

The 29-year-old, originally from Aylesbury, Buckinghamshire, has been dubbed the world's most wanted woman and is wanted by Kenyan police over links to a terrorist cell planning bomb attacks. She was believed to have fled over the border from Kenya to Somalia in March 2012.

The widow of 7/7 Kings Cross bomber Germaine Lindsay, Lewthwaite was arrested along with Grant on suspicion of terrorist offences in December 2011, but escaped along with her three children and has been on the run in Africa ever since.

She is also alleged to have ordered the killings of two radical Muslim clerics, two Protestant preachers, and three others with links to terror-group al-Shabaab.

A grenade attack in Kenya, which killed three fans who were watching the Italy vs England Euro 2012 football match, has also been linked to Lewthwaite, whom security officials said was trying to recruit all-female terrorist squads in Somalia.

There has also been speculation that she was involved in the Nairobi mall masscare, which killed 62 people.