Three men arrested in south London on Saturday in connection with the murder of Drummer Lee Rigby have been released on bail, Scotland Yard has said.

The men, aged 21, 24 and 28, who were arrested on suspicion of conspiracy to murder, have been bailed to return later to a police station in London.

Two men arrested on suspicion of murder at the scene of Wednesday's killing in Woolwich remain in custody.

A 22-year-old man arrested on Sunday in north London is also still being held.

His arrest by counter-terrorism police in the Highbury Grove area on suspicion of conspiracy to murder was the ninth arrest as part of the investigation.

The other three people - a 29-year-old man, a 31-year-old woman, and a 29-year-old woman - were arrested on Thursday on suspicion of conspiracy to murder.

The two women were released without charge on Friday, and the man was released on bail on Saturday pending further inquiries.

Kenya arrest

Analysis Confirmation of Michael Adebolajo's arrest in Kenya in 2010 - preparing, according to the Kenyan authorities, to train and fight in Somalia - raises troubling questions. British security officials have had long-standing concerns about the risk of young men travelling to join the militant group, al-Shabab, and returning to pose a danger on the streets of the UK. Earlier this month, when David Cameron hosted a conference on Somalia he said the challenges of terrorism and extremism "matter to Britain - and to the whole international community." So you might have expected Michael Adebolajo to have been firmly on the radar of the security services when he returned to the UK. They will now be under renewed pressure over exactly what they knew about him, and whether more could have been done to prevent the killing of Drummer Lee Rigby.

The two murder suspects, Michael Adebolajo, 28, and Michael Adebowale, 22 - both Britons of Nigerian descent who are understood to be converts to Islam - remain in custody in hospital in a stable condition after being shot and wounded by police at the scene after the killing.

The Metropolitan Police said that the men would not be questioned until they had been discharged from hospital, and the time they had spent under arrest in hospital would not count towards the maximum amount of time they could legally be held without charge.

Shortly before his arrest, Mr Adebolajo was filmed by a passer-by saying he had carried out the attack because British soldiers killed Muslims every day.

On Sunday the Foreign Office confirmed it had given consular assistance to suspect Mr Adebolajo when he was arrested in Kenya in 2010.

Kenyan government spokesman Muthui Kariuki told the BBC he was believed to have been preparing to fight with Somali militant group al-Shabab.

In video footage of his court appearance, Mr Adebolajo is heard to say: "These people are mistreating us, we are innocent."

Mr Adebolajo was then handed over to "British security officers" when it emerged he was a UK citizen, Mr Kariuki added.

Media playback is unsupported on your device Media caption Footage shows Michael Adebolajo in court in Kenya in 2010

BBC world affairs correspondent Caroline Hawley said confirmation of the arrest would renew the pressure on the UK security services over how much they had known about Mr Adebolajo and whether more could have been done to prevent Drummer Rigby's killing.

In other developments:

Downing Street has said that Prime Minister David Cameron, who has been criticised by newspapers for going on a week-long family holiday to Ibiza, has a small team of officials with him and is being kept fully informed about the investigation

Police are investigating after two monuments in central London - the Animals in War memorial in Park Lane and the RAF Bomber Command memorial in Green Park - were defaced with the word Islam in red spray paint

Humberside Police have arrested two people after a fire broke out at the Grimsby Islamic Cultural Centre on Sunday night. No-one was injured and the force said it was "too early to speculate why the fire was started"

Several hundred supporters of the far-right group, the English Defence League (EDL), reportedly pushed their way through a police cordon at Trafalgar Square while on a march through central London on Monday. The march is being followed by a demonstration outside Downing Street

Image caption Vandals have crossed out an inscription on the Animals in War memorial in central London

On Sunday members of Mr Rigby's family visited the scene of the killing, laying flowers at Woolwich Barracks where the 25-year-old drummer with the Royal Regiment of Fusiliers was based.

They laid flowers at Woolwich Barracks where they hugged and comforted each other as they looked at some of the many thousands of floral tributes that have been left in his memory.

They then crossed the road to look at the exact spot where he was killed.

One family member clutched a teddy bear, while others held baskets of flowers which they left at the scene.

A few hours later, several hundred people gathered there during an organised community event with some waving Help for Heroes flags and chanting Drummer Rigby's name.