Police investigating a fatal stabbing have released footage of two men walking along an east London street in the moments after the unprovoked attack.

CCTV shows the men walking close to the scene of the assault on Daniel Frederick, 34, who died days before his former partner appeared on ITV's The Voice.

Keisha Rodney, who has a one-year-old son with Mr Frederick, wowed judges as part of the girl group Loaded Sista, having been chosen as part of will.i.am's team.

Officers believe the ambush by five men on January 8 was a case of mistaken identity and that Mr Frederick was a 'completely innocent victim'.

It is thought one of the men in the CCTV, wearing dark trousers (left), was involved in the stabbing of Mr Frederick (right)

Keisha Rodney, the former partner of Daniel Frederick, and Salli Flaherty perform as girl group Loaded Sista on ITV's The Voice

It is thought one of the men in the CCTV, wearing dark trousers, was involved in the incident and may have suffered a stab wound to his right leg, which appears bandaged.

Ms Rodney, 34, told the Evening Standard last week: 'His sister called me to tell me he had been stabbed and was in hospital.

'My first thought was that he would survive — he was so strong. He passed away that night — it was the biggest shock. He was a good dad.

There was no bitterness in the split. I have nothing bad to say about him — he gave me the amazing gift that is Carter.'

Detective Inspector Paul Considine, who leads the investigation, said: 'From the information I have, it seems that Daniel may have been mistaken for somebody else.

'He appears to be a completely innocent victim who was walking through the estate when he was subjected to an unprovoked attacked.

Keisha Rodney and Salli Flaherty wowed judges as part of the girl group Loaded Sista, having been chosen as part of will.i.am's team

Ms Rodney, 34, revealed last week how Mr Frederick's sister had told her that he has been stabbed and was in hospital, and how she expected him to survive the attack

'I have released these images today in a bid to jog the memory of anyone who might have seen these men or know them - please contact us urgently.

'I believe one of the two men, the one in the darker jacket, may well have sustained an injury to his right leg during the attack which might be consistent with a stab wound.

'We are also still appealing in general for any witnesses or anyone with information who has not yet spoken to us to come forward.'

An 18-year-old man was arrested in Essex on suspicion of murder on Monday, while a 41-year-old woman was arrested on suspicion of assisting an offender.

They follow the arrest and release of a 26-year-old man on suspicion of murder on January 10, and the arrest of a 16-year-old boy on January 22, who has been bailed.

Anyone with information is asked to contact the incident room on 020 8345 3734.

Alternatively, you can contact Crimestoppers anonymously on 0800 555 111 or at crimestoppers-uk.org