The soldier killed in an attack in London 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.
The suspects, one of whom is said to be Islamist protester Michael Adebolajo, were known to security services.
Scotland Yard said the latest arrests were of a man and woman, both aged 29.
Drummer Rigby’s family issued a statement on Thursday, saying: “Lee was lovely. He would do anything for anybody, he always looked after his sisters and always protected them. He took a ‘big brother’ role with everyone.
“All he wanted to do from when he was a little boy, was be in the Army.
“He wanted to live life and enjoy himself. His family meant everything to him. He was a loving son, husband, father, brother, and uncle, and a friend to many.”
‘Popular and witty’
A post-mortem examination was being carried out on Thursday.
The Ministry of Defence also paid tribute to Drummer Rigby.
“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.”
Drummer Rigby, from Middleton, Greater Manchester, joined the Army in 2006. He was described as a “loving father to his son Jack” and someone who would be “sorely missed by all who knew him”.