The Met Police has released mugshots of 19 suspects it’s hoping to catch before Christmas.
The force is planning to display the images on the side of police vans across London from Wednesday.
The suspects are wanted for several offences, including robbery, drugs charges, GBH, kidnapping and possessing offensive weapons.
Detective Chief Superintendent Lee Hill, head of the Met’s Violent Crime Taskforce, said: “We are asking the public to be additional eyes and ears to help us locate people we need to speak to in connection with a number of serious offences.
“We often get asked by the public how they can help keep their communities safe, and providing information such as this is enormously helpful both in preventing and detecting crime.
“People shouldn’t just view it as ‘helping the police’, you are directly helping your communities and the wider London community."
The individuals include suspects from specific incidents, breached bails or probation conditions and people who have not turned up to court.
The Met said anyone who supplied information would be treated dealt with in strict confidence and could supply details anonymously to Crime Stoppers.
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Detective Chief Superintendent Hill added: “Violence, drugs and other priority crimes, such as robbery, are of great concern to the communities of London, so we are committed to tackling them robustly and pursuing those we suspect to be involved in causing harm and attempting to evade justice. Help us to keep London safe.
“One phone call could help potentially solve or even prevent a crime from happening.”
Police warned the public not to approach the suspects and advised them to call 999 from a safe place instead.
Anyone with information is asked to contact police or Crime Stoppers anonymously on its website or by calling 0800 555 111.