Flying Squad detectives are appealing for information following a series of gun-point robberies in North London.
Police have linked five robberies carried out at four different commercial premises during a 12-month period from May 2016.
CCTV footage has been released of the latest offence at 3:25am on 18 May 2017 at the Nationwide Building Society on Walthamstow High Street.
The two suspects, who were dressed in dark clothing and motorcycle crash helmets, threatened two security guards who were refilling a cash machine.
One of the suspects, who was armed with a silver self-loading pistol complete with a black silencer, fired the gun a number of times after the guards refused to hand over the cash.
One of the guards was shot in the leg three times causing serious injuries, which required him to stay in hospital for a week.
The suspects escaped from the venue in a stolen Ford Fiesta which has since been recovered.
This robbery has been linked to four other offences in 2016, three of which involved the use of a gun.
The first offence was committed at 3:57am on 23 May 2016 at Cyprofood, a 24-hour cash and carry, on Brantwood Road in Tottenham.
A member of staff was pistol-whipped by two men who were both armed with guns. They used a silver coloured Audi A4 with stolen number plates. This vehicle has never been recovered.
The second offence was committed at The Santander Bank on Woodgrange Road at 2:45am on 28 June 2016. The two suspects ambushed two security guards who were refilling the cash machine. One of the suspects was armed with a revolver-style firearm.
Once inside the bank, the suspects stole a quantity of cash and drove off in a silver VW Scirocco, which has not been located.
The third offence relates to an armed robbery committed at The Santander Bank on Mare Street in Hackney at 11:55pm on 29 August 2016. The victims of the robbery, two security guards, were refilling a cash machine when they were ambushed by two men, described as large build.
One of the men was in possession of a silver self-loading pistol with a black silencer. The suspects obtained cash and drove off in a stolen Range Rover Sport which has since been recovered by police.
The fourth offence was committed at the same Santander Bank on Mare Street at 1:47am on 3 December 2016. Two suspects again attacked two security guards as they were delivering cash to the bank.
Once inside the venue, the suspects attempted to steal a quantity of money but were prevented by the actions of the victims and a member of the public. The suspects escaped in a white 4×4 Mitsubishi Outlander, which has been recovered by police.
Detectives from the Flying Squad are now seeking any information about the identity of the people pictured in the images and in the CCTV footage.
Police would also like to speak to anyone with any information about the whereabouts of the firearms used in the offences or the outstanding stolen vehicles: a silver Audi A4 and a silver VW Scirocco
Crimestoppers is offering a reward of £5,000 for any information given to the charity that leads to the arrest and conviction of the people responsible for the armed robberies.
Anyone who knows where these men or the firearms are, can contact Crimestoppers anonymously on 0800 555 111 or via the non-traceable anonymous online form at crimestoppers-uk.org
Detective Chief Inspector Nick Blackburn, of the Met’s Flying Squad, said: “An increasing amount of violence is being used during these offences and we need the public’s help to identify the suspects, their firearms and the stolen cars they escaped in.
“In the latest offence, a guard was shot a number of times at close range. Fortunately, he has recovered from his physical injuries but has suffered a severe psychological impact from the incident.
“Any piece of information, no matter how small, could be what we need to identify the men responsible for these crimes.”