Detectives say they have received an overwhelming response to the release of a further 20 photographs of Bradford riots suspects.
Only hours after the mugshots were published in yesterday's Telegraph & Argus, police said they had already put names to 19 of them.
The riot incident room has received more than 180 calls by today and four men had handed themselves into officers.
The only suspect police still need to identify is the man in the photograph number S59.
Detective Chief Superintendent Max McLean, who is leading the inquiry into the riots on July 7 in which more than 300 police officers were injured and millions of pounds of damage was caused, said: "This is fantastic news. The support that has been shown proves that we have captured the public mood in Bradford.
"We do still need people to continue to support us by calling if they recognise these faces.
"They are not just faces in the crowd they have taken part in serious criminal acts including assaults on police officers.
"Local people have a vital part to play in the investigation.
"The message to those involved in the disorder is give yourself up. It could be your photograph that will be released next."
Bradford Council leader Margaret Eaton also backed the mugshot campaign to bring those responsible for the riots to justice.
She said: "I am pleased that so many people came forward with valuable information when the first pictures were issued last week.
"I would urge them to be as responsive again this time by supporting the police in finding those responsible."
More than 300 crimes were committed during the disturbances including criminal damage, robbery, attacks on police officers, serious assaults and robbery.
Thirty-five people were arrested on the night and 11 more since.
Out of the 20 people identified from the first set of mugshots 19 are from Bradford and one from Halifax. All of those arrested are from Bradford.
Det Chief Supt McLean said the average age of those identified from the last set of mugshots was 19.
Images of the suspects have been forwarded to all UK ports and airports and detectives have pledged they will travel abroad to arrest offenders if necessary.
Det Chief Supt McLean said officers had checked one Pakistan-bound flight from Manchester airport after receiving information it contained two identified suspects.
This turned out to be a false alarm with two travellers sharing suspects' names.
Anyone with information on any of the suspects should contact the incident room on (01274) 376915 or the Urdu-speaking hotline on (01274) 376916.
E-mails can been sent on bradfordriots@westyorkshire.pnn.police.uk
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