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US President Obama has outlined plans to limit the use of US drones, saying they must be targeted against terrorists when a threat was "imminent." Responsibility for launching a drone has been transferred from the CIA to the US Department of Defence. He said:
"To say a military tactic is legal, or even effective, is not to say it is wise or moral in every instance.
"Any drone strike will only be launched when a terrorism suspect cannot be captured. The United States will respect state sovereignty and will limit strikes to al Qaeda or associated targets.
"And before any strike is taken, there must be near-certainty that no civilians will be killed or injured - the highest standard we can set."
The family of murdered Drummer Lee Rigby, 25, tonight paid tribute to "a loving son, husband, father, brother and uncle", adding that "he always wanted to be in the Army, live life and enjoy himself."
Tributes have been paid to Drummer Lee Rigby, the "cheeky and humorous" soldier killed in an attack in Woolwich yesterday.
Today the two men suspected of killing him were under armed guard in hospital and two more people were arrested in connection with the death.
As more details emerged about Michael Adebolajo, one of the men suspected of murdering the soldier, David Cameron insisted the country would not give in to terror.
This report is by ITV News UK Editor Lucy Manning:
Footage has emerged of Woolwich attack suspect, Michael Adebolajo.
The footage shows him at an Islamist protest outside Paddington Green police station in 2007.
London mayor Boris Johnson told ITV News that he was "absolutely confident" that people responsible for the death of solider Lee Rigby in Woolwich would be brought to justice.
He said: "People in London should realise that this is a very safe city and they can go about their business as normal."
"The killers of Lee Rigby are going to be brought to justice - I can be absolutely confident of that," he added.
He said he had no concerns about the time it took police to arrive to the incident and paid tribute to Ingrid Loyau-Kennett, a woman who confronted the alleged attackers as a man lay dead in front of them.
US President Barack Obama issued a statement in which he condemned the attacks in Woolwich yesterday, adding that he would discuss "important global security challenges our countries face together" with David Cameron in June.
I condemn in the strongest terms the appalling attack against a British service member in Woolwich on May 22.
The United States stands resolute with the United Kingdom, our ally and friend, against violent extremism and terror.
– Barack Obama
There can be absolutely no justification for such acts, and our thoughts and prayers are with the family of the victim, the police and security services responding to this horrific act and the communities they serve, and the British people.
Our special relationship with the United Kingdom is especially important during times of trial, and I look forward to my trip to the United Kingdom to participate in the June G-8 Summit, hosted by Prime Minister Cameron, which will include discussions on the important global security challenges our countries face together.
A Scotland Yard statement added that six properties in London and Lincolnshire have so far been searched as part of the investigation into the murder of Drummer Lee Rigby in Woolwich yesterday.
– Metropolitan Police statement
Search warrants have been executed under PACE at six residential addresses; three in south London, one in east London, one in north London and one in Lincoln. The searches are ongoing.
Scotland Yard said that detectives from the Counter Terrorism Command have made two further arrests as part of their investigation into the murder of a soldier in Woolwich.
A statement said:
– Metropolitan Police
A 29-year-old man was arrested on suspicion of conspiracy to murder under PACE.
A 29-year-old woman was arrested at residential address in south London on suspicion of conspiracy to murder under PACE.
They both remain in custody at a south London police station.
A man and woman, both 29, were today arrested on suspicion of conspiracy to murder in relation to the Woolwich terror murder of Drummer Lee Rigby, Scotland Yard said.