U.K. girl who went to ISIS area of Syria reported killed

​One of three London schoolgirls who travelled to an area controlled by ISIS to become "jihadi brides" is said to have been killed in an airstrike.

Kadiza Sultana was among trio of teens who left home to be 'jihadi brides'

Kadiza Sultana, seen here in a police handout, is believed to have been killed by an airstrike in Raqqa, Syria, according to a family lawyer. (Metropolitan Police)

​One of three London schoolgirls who travelled to an area controlled by the Islamic State in Iraq and Syria (ISIS) to become "jihadi brides" is believed to have been killed in an airstrike, a lawyer for her family says.

Tasnime Akunjee told the BBC that Kadiza Sultana's family had been told that she died in the ISIS stronghold of Raqqa several weeks ago. He said the family was "devastated."

He said the death has not been confirmed. Akunjee did not immediately respond Friday to messages from The Associated Press.

Sultana was 16 when she and classmates Shamima Begum and Amira Abase — both 15 — travelled to Syria in February 2015 without telling their families. Their distraught relatives made emotional public appeals for them to come back.

ITV News, which first reported Sultana's death on Thursday, broadcast phone calls between Sultana and her sister in Britain, in which Sultana said she felt she wanted to return to Britain but could see no way of escape.

Fifteen-year-old Amira Abase, left, Kadiza Sultana, 16, centre, and Shamima Begum, 15, flew to Turkey from London in early 2015. (Metropolitan Police Service/Associated Press)

"I don't have a good feeling. I feel scared," Sultana said in one call. "You know the borders are closed right now, so how am I going to get out?"

Her sister, Hamila Khanom, told ITV: "We were expecting this in a way. But at least we know she is in a better place."

Akunjee told ITV the only good that could come of Sultana's death would be as "a testimony for others of the risks of actually going to a war zone, to dissuade people from ever making that choice."

U.K. police estimate at least 800 Britons have travelled to join or support ISIS, and dozens of them have been killed.