Meanwhile police release CCTV images of two more men.

Two 17 year olds will appear in court today charged with killing Dean Mayley in Greenford and police have today released images of two other men they would like to question.

The 24-year-old - from Northolt - who had learning difficulties - was stabbed on Ruislip Road, Greenford, at approximately 17.20hrs on Friday, 7 February.

Police released CCTV footage showing some of his last movements.

In the footage, the 24-year-old is seen getting off an E9 bus in Ruislip Road East, Greenford, at around 16.25hrs on Friday, 7 February and walking away in the direction of The Broadway.

Detective Chief Inspector Matt Bonner, of the Homicide and Major Crime Command, is leading the investigation.

He said: "I hope this footage might help people to recall the events that led to Dean's tragic death.

"This was a vulnerable man who would have shown an unusual degree of trust in those who he came across and it is utterly sickening that he should have been set upon in this way.''

Two teenagers arrested on Saturday (15th February) have been charged with murder. They have also been accused of conspiracy to rob and possession of an offensive weapon.

They will appear in custody at Willesden Youth Court today.

Detectives have today (17th Feb) released images of two men whom they wish to speak with in connection with the murder.

Anyone who can help identify the men should call the incident room on 020 8358 0200 or Crimestoppers anonymously on 0800 555 111.

17th February 2014