A house in a Lincolnshire village has been raided by Met police officers investigating Wednesday's alleged terror attack in Woolwich, London.
Officers swooped on the detached house as the name of one of the suspects was revealed on internet forums and Twitter as Michael Adebolajo.
He has been identified as the alleged killer seen ranting on video shortly after the murder of the soldier in Woolwich.
It is understood the men, who are being treated in separate hospitals while under arrest, are most likely to be British citizens of Nigerian descent who have converted to a radical form of Islam.
However, they are not thought to have links to terror groups based in Nigeria, such as the jihadist militant organisation Boko Haram.
Michael Adebolajo, 28, and his unnamed accomplice are believed to have run down the off-duty British soldier with a Vauxhall Tigra as he walked back to the Woolwich Barracks at 2.20pm yesterday, crushing his body against a road sign.
Witnesses said the terror suspects then 'hacked and chopped' at his body like 'crazed animals', before dragging his corpse into the middle of the road leaving a trail of blood.
Meanwhile the soldier killed in the attack has been named as Drummer Lee Rigby of the 2nd Battalion the Royal Regiment of Fusiliers.
Drummer Rigby, 25, from Manchester, leaves behind a two-year-old son.
Two suspects shot by police after Wednesday's attack in Woolwich remain under arrest. A further two people have been arrested on conspiracy to murder.
Scotland Yard said the latest arrests were of a man and woman, both aged 29.
The victim's name was announced by the Ministry of Defence pending formal police identification. A post mortem examination was being carried out on Thursday.
In a statement the MoD said: "An extremely popular and witty soldier, Drummer Rigby was a larger than life personality within the Corps of Drums and was well known, liked and respected across the Second Fusiliers.
"He was a passionate and life-long Manchester United fan."
Police were today seen outside a £365,000 detached house in a Lincolnshire village where they raided a home where Adebolajo is listed as having lived in the past.
There was no answer at the address believed to be that of Adebolajo's father, named by neighbours as Anthony Adebolajo.
Adebolajo, 56, is believed to be a trained nurse now working in a managerial capacity within the NHS.
The modern property was being monitored by two police patrol cars stationed outside.
Later in the morning, plain clothes officers, thought to be from the Metropolitan Police, arrived at the modern estate and the house and driveway was sealed off with police tape. An officer at the scene described the property as a 'crime scene'.
Adebolajo bought the property in 2002. At one time a woman who wore a burka was thought to live with him.
They believed he had up to four grown up children, although few if any are thought to have stayed at the house for any period of time.
The Punch