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A London schoolgirl who fled to Syria to join terror group Islamic State has mocked the victims of the Tunisia massacre.

Amira Abase, 16, unwittingly told an undercover reporter at the Mail on Sunday that she was "laughing out loud" when asked about her reaction to the shootings, which saw 30 Britons killed.

In an online conversation with the reporter, the former Bethnal Green Academy pupil appeared to know little about the recent attack by gunman Seifeddine Rezgui in Sousse.

But when she was told that Muslim leaders were condemning the attacks, she simply replied "LOL" - text speak for "laughing out loud".

Reporter Abul Taher had contacted Ms Abase under the pretence that he was a fellow British Muslim teenager planning to run away and join Islamic State.

Ms Abase fled London in February along with friends Shamima Begum, 15, Kadiza Sultana, 16, to become so-called "jihadi brides".

Yesterday video emerged of three girls carrying automatic rifles around Raqqa, Syria - an Isis stronghold, but there were conflicting reports as to whether the trio were the former Bethnal Green Academy pupils.

Two of the girls have since married IS militants after choosing from a catalogue of suitors, according to reports.

Members of the girls' families, who appeared before a committee of MPs in March, claimed they were normal teenagers who watched shows including Keeping Up With The Kardashians.

Tunisian gunman Rezgui, a university graduate, also had links to IS.

Tunisian authorities have said he acted alone in the rampage but had accomplices who supported him beforehand, providing him with weapons and logistical support.

A state of emergency has been declared in the north African country in the wake of the terrorist attack on June 26, which saw 38 people killed.

Tunisian president Beji Caid Essebsi has said armed police will be deployed to beaches as an investigation looks at possible security failures.