One of Scotland Yard's most senior police officers will be quizzed by MPs over the investigation into the murder of Manchester soldier Lee Rigby.
Father-of-one Drummer Rigby was hacked to death in broad daylight near Woolwich barracks in south-east London on May 22.
Metropolitan Police assistant commissioner Cressida Dick will appear before the Home Affairs Select Committee later to answer questions on the shock killing, which has brought community tensions to the surface and prompted the Prime Minister to set up a new anti-terror task force.
Ms Dick's evidence comes after two men - Michael Adebolajo, 28, and Michael Adebowale, 22 - appeared in separate courts charged with Drummer Rigby's murder.
Two men aged 42 and 46 arrested on suspicion of being involved in the illegal supply of guns in connection with the murder of soldier Lee Rigby have been released on bail pending further inquiries, the Metropolitan Police said today
The family of Drummer Lee Rigby have called for calm in the wake of his murder. In a statement, they said Lee would not want people to use his name as an excuse to attack others.
Meanwhile, the Queen visited the barracks to speak to colleagues who helped co-ordinate the response to the killing.
The Queen has visited the barracks where Lee Rigby was based.
The young soldier from Manchester was killed in the street last week.
One man has been charged with his murder, whilst police are waiting to question a second.
Ashley Derricott reports.
Detectives investigating the murder of soldier Lee Rigby have arrested a man on suspicion of being involved in supplying illegal firearms.
The 42-year-old was held in north London this morning and is currently being questioned at a police station in south London, Scotland Yard said.
Searches are also being carried out at homes in north and east London as part of the ongoing investigation into Drummer Rigby's death.
The family of Lee Rigby today thanked the public for the "overwhelming support" they had received and appealed for calm, saying in a statement: "We would like to emphasise that Lee would not want people to use his name as an excuse to carry out attacks against others."
The inquest into the death of the soldier who was killed in Woolwich opens this morning. Drummer Lee Rigby from Manchester died near his barracks in London last week.
The inquest is taking place at Southwark Coroner's Court.
In this court sketch, Woolwich suspect Michael Adebowale is seen being taken to the dock of Westminster Magistrates' Court where he spoke only to confirm his name, age and address.