'Jihadi John' is one of the world's most wanted men, responsible for the murder of several US and UK hostages.Read the full story ›
Downing Street have declined to confirm or deny that the reported name of the IS militant fighter known as 'Jihadi John' was known to the intelligence and security services and said any information in the public domain that would potentially damage the "ongoing investigation" was a matter of concern.
The Prime Minister would be concerned about information being put into the public domain at any time that might jeopardise ongoing police or security investigations or the safety of British citizens. There is an ongoing investigation. It is absolutely right that we allow the police and security agencies to do all they can to bring those responsible to justice and to help keep British people safe.
ITV News understands the man named by media outlets as Jihadi John comes from the West Kensington area of London, and that he left for Dar Es Salaam in Tanzania in May 2009 in the company of two other men.
It is also understood that the security services in the UK had had previous contact with him when they suspected he was going to fight in Somalia.
The Metropolitan Police says it will not confirm the identity of "Jihadi John", and claimed it had asked media organisations not to speculate on the details "on the basis that life is at risk".
Commander Richard Walton, head of the Met's Counter Terrorism Command, said: "We are not going to confirm the identity of anyone at this stage or give an update on the progress of this live counter-terrorism investigation."
Downing Street has refused to confirm or deny reports of the identification of an Islamic State militant known as "Jihadi John".
The man - identified in a number of outlets today - has been pictured in a series of videos showing beheadings of captives, including British citizen Alan Henning.
ITV News cannot independently verify details about him at this stage.
The MP who represents the three London girls believed to have travelled to Syria to join Islamic State has called for an urgent inquiry into how young people can be better protected from radicalisation.
Labour's Rushanara Ali, who represents the Bethnal Green and Bow constituency where the teenagers come from, said families, schools, mosques, youth clubs and internet companies need better guidance on how to protect young people.
During Prime Minister's questions, Ms Ali said:
Last week three young women from my constituency left their homes, travelled to Turkey, and are now thought to have been smuggled into Syria. Their families are devastated.
I know the Prime Minister is making every effort to find them and encourage their return. Will you set up an urgent inquiry into these events to ensure that families, schools, mosques, youth clubs, internet companies and all agencies are guided on how they can better protect our young people?
Mr Cameron replied:
Clearly anyone who saw the parents on television talking about the children couldn't help be moved by their plight.
What I have done is ask the Home Secretary to look urgently with the Transport Secretary at all the protocols we have in place about young people and travelling and what airlines do and what we can do.
Counteracting the online threat is just one way to prevent young people becoming radicalized, a security expert tells ITV News.Read the full story ›
The Metropolitan police have said they believe the three schoolgirls missing from east London are no longer in Turkey, and have crossed the border into Syria.
It is believed the girls are attempting to join IS.
Scotland Yard has responded to criticism that it took British authorities too long to alert Turkey that the three teenagers were missing and feared bound for Syria.
Once we established that the girls had travelled to Turkey, police made contact with the foreign liaison officer at the Turkish Embassy in London on Wednesday, 18 February.
Since then we have been working closely with the Turkish authorities who are providing great assistance and support to our investigation.
Turkey has criticised British authorities for taking three days to alert the country over the three teenage schoolgirls believed to be on the way to Syria via Istanbul.
Shamima Begum, 15, Kadiza Sultana, 16, and 15-year-old Amira Abase are still missing after they boarded a flight from Gatwick Airport to Istanbul last Tuesday - feared to be intending to join the so-called Islamic State (IS).
Turkish deputy prime minister Bulent Arinc said that British officials would be to blame if the girls cannot be found.
He said: "It is a condemnable act for Britain to let three girls come to Istanbul and then let us know three days later. They haven't taken the necessary measures.
"The search is ongoing. It would be great if we can find them. But if we can't, it is not us who will be responsible, but the British."