- Video report by ITV News Security Editor Rohit Kachroo
British jihadist Sally Jones has been killed in a drone strike in Syria, ITV News understands.
Jones - who became known as the White Widow - left the UK to become an IS recruiter in 2013, taking her son Jojo with her.
The 50-year-old is thought to have been killed in June, but news of her death has only emerged now.
The story was first reported in The Sun.
The newspaper also reported her son was killed in the blast, but this remains unclear.
Jones was high on a US kill list after being used by IS to recruit foreign female jihadis.
She also called on would-be British recruits to carry out "lone wolf" attacks in the UK.
Jones is said to have been killed in a US drone strike as she tried to flee Raqqa.
Her jihadi husband Junaid Hussain was killed by a US drone in 2015.
Before his death, he had allegedly been planning "barbaric attacks against the West", including terror plots targeting "high profile public commemorations" this summer.
Labour leader Jeremy Corbyn said Jones' death is "significant" if it is officially confirmed.
He added: "I represent a constituency that lost many people in 7/7, and we remember what happened that day."
- Who was Sally Jones?
The former punk rocker was a mum-of-two from Chatham, Kent, who became radicalised after marrying jihadi Junaid Hussain.
She fled to Syria in 2013, taking her son Jojo with her. She has another 20-year-old son who remained in the UK.
Jones, who had no previous military training, used social media to recruit Western girls.
She shared pictures of herself with guns and offered advice on how to make bombs and travel to Syria.
Before joining IS, Jones reportedly worked as a perfume saleswoman.
In July, it was reported she wanted to return to the UK.
But one woman, who claims to have befriended Jones in Syria, said Jones had vowed to die fighting with IS.
The brother of a woman Sally Jones recruited to IS told ITV News that he was having a mixture of emotions at the news of her death.