London attackers identified as mosques targeted by rioters
Two men accused of hacking a soldier to death on a London street in revenge for wars in Muslim countries are British of Nigerian descent, sources say.
Both suspects in the killing of a serving soldier in London were known to security services, senior UK government sources have confirmed.
One of the suspects is understood to be 28-year-old Muslim convert Michael Adebolajo, according to sources.
He and another man are under arrest in hospital after being shot by police after Wednesday's attack in Woolwich.
Prime Minister David Cameron has said the UK will "never give in to terror or terrorism".
Shortly after the killing a man, thought to be Adebolajo, was filmed by a passer-by, saying he carried out the attack because British soldiers killed Muslims every day.
Sources said reports the men had featured in "several investigations" in recent years - but were not deemed to be planning an attack - "were not inaccurate".
They confirmed one of the suspects was intercepted by police last year while leaving the country.
Speaking outside 10 Downing Street on Thursday, Cameron said: "One of the best ways of defeating terrorism is to go about our normal lives."
He said there was no justification in Islam for the attacks, which were "solely and purely" the responsibility of the individuals involved.
Across London there are 1,200 extra police officers on duty in response to the attacks, Assistant Commissioner Simon Byrne said.
Earlier officers raided a flat believed to belong to one of the attackers on a Greenwich housing estate.
Neighbours said two sisters in their 30s, an older woman and a teenage boy were taken away in a police van.
An address in Saxilby, Lincolnshire, is also being searched in connection with the attack.
Meanwhile, English Defence League supporters clashed with police near Woolwich Arsenal railway station just hours after the soldier's death.
Elsewhere, two men were arrested following separate attacks on mosques following the murder, during which two men were reported to have shouted "Allahu Akbar" - "God is greater" in Arabic.
In Woolwich, a group of between 75 and 100 men gathered at The Queen's Arms pub on Burrage Grove, where they sang nationalist songs.
EDL leader Stephen Lennon said: "Enough is enough. Our message is enough, enough. We have weak leaders. Our police, our leaders tip-toe around this issue.
"This issue is political Islam, political Islam that is spreading across this country."
Bottles and other missiles were thrown at police in a square near the station. Police tried to contain the protesters and control them using baton charges.
London mayor Boris Johnson also made a statement in which he emphasised that religion should not be blamed.
"It is completely wrong to blame this killing on the religion of Islam," the mayor said.
"It is also wrong to draw a link between this and British foreign policy and soldiers risking their lives in the name of freedom.
The fault lies exclusively in the warped and deluded mindset of the people that did it."
Video footage filmed by an onlooker and broadcast by Britain's ITV news channel showed a man with hands covered in blood and holding a bloodied meat cleaver and a knife.
"I apologise that women had to witness this today but in our lands, our women have to see the same," he said. "You people will never be safe. Remove your government, they don't care about you."