A group of young men who posed for a mannequin challenge are being sought by police after two robberies.
A man was attacked by two men and his phone stolen on Fredrick Road in Salford at around 11.55pm on Monday 14 November last year.
Two other men stood and watched.
The victim had seen the attackers get out of a blue Ford Focus before the incident and saw them return to the same vehicle after pushing him to the ground and stealing his gold-coloured iPhone 5S.
A few minutes later, another man was at a bus stop on Eccles Old Road, about five minutes away, when he was approached by three men.
They grabbed him and pushed him to the ground before taking his Samsung S7 Edge phone.
As they had in the first robbery, the attackers demanded the phone's password before getting into a blue Ford Focus and driving off.
Police later found that the car had driven off without paying for petrol 11 times at forecourts across Greater Manchester, including at Swinton and Middleton.
They stopped the car in Manchester city centre, arresting the 22-year-old driver Roger Bosion.
Bosion was bailed until December but he has since disappeared.
When they searched the car they found the Samsung phone, a number of other mobile phone and debit cards.
The phone owners have yet to be found but the debit cards had all been reported as stolen.
One of the phones contained footage of two mannequin challenges that happened before and after the robberies, police said.
Detective Constable Allan Barker, of Greater Manchester Police, said: "These two robberies happened in such quick succession that there was no regard for the safety of the victims who were left shaken, upset and terrified.
"We have been following a number of enquiries but we have not yet been able to identify those responsible so it is imperative that we speak to the group of people in the footage to be able to move forward with the investigation."
He said Bosion may be in London or the surrounding area.
:: Anyone with information should contact police on 0161 856 5361 or Crimestoppers on 0800 555 111.