Briton linked to ISIS vows to be first woman to behead British or American prisoner

A British woman linked to the Islamic State of Iraq and Syria (ISIS) in Syria has vowed to be the first women to behead a British or American prisoner.

The statement appeared on Twitter under the name Muhajirah fi Sham, meaning "immigrant in Syria" on Tuesday, a day after the ISIS posted a video online showing the beheading of American journalist James Foley, reported the Daily Mirror.

Khadijah Dare hailed from Lewisham in South-east London and is believed to have left Britain in 2012 to live in Syria.

The report said that she converted to Islam during her teenage and started to attend a mosque linked to the killing of British soldier, Lee Rigby in South London Street last year. She was also a regular at the Lewisham Islamic Centre and married a Turkish man she met in Sweden.

The woman, believed to be 22 years old, sparked outrage after she posted a picture of her son carrying an AK47 on Twitter. Her social media account is filled with tweets praising the ISIS militants and brutal pictures of heads of beheaded men on railings.