Met Police have arrested more than 100 revellers on the first day of Notting Hill Carnival this year.
The force confirmed some 140 people have been apprehended for a variety of offences.
The figure represents a rise of 40 arrests compared to the Sunday last year.
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It is understood 15 assaults on police were recorded and that 21 arrests were made for possession of an offensive weapon.
In a statement, a spokesman for the Met Police said: "The policing operation for the first full day of Notting Hill Carnival has moved into the dispersal phase as crowds head home from the event.
"A significant number of officers remain in the area to deal with any incidents.
"As of 7.45pm, there had been 140 total arrests as part of the policing operation.
"105 arrests took place at Carnival itself, while 35 took place on the approaches to Carnival as a result of proactive policing interventions.
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Met Police have arrested more than 140 people on the first day of Notting Hill Carnival | PA"Of those 35 arrests on the approaches, 13 followed positive identifications using live facial recognition.
"A breakdown of the total offences is below:
Assault on police – 15
Possession of an offensive weapon – 21
Possession of cannabis – 25
Possession of class A drugs – 6
Possession of other drugs – 2
Possession with intent to supply drugs – 19
Robbery – 2
Public order – 4
Sexual offences – 4
Other – 42
"Of the officers who were assaulted, one has injuries to their hand which required hospital treatment.
"We will ensure all officers receive the appropriate support."
Some 7,000 police officers will be on London's streets for the event
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The use of facial recognition technology today marks a major breakthrough in the use of the software following concerns from campaign groups and the equalities watchdog.
Ahead of the event, the Equality and Human Rights Commission (EHRC) claimed the technology was "unlawful" because it is "incompatible" with human rights laws.
It warned the force’s rules and safeguards over using the tool "fall short" and could have a "chilling effect" on individuals’ rights when used at protests.
However, Metropolitan Police commissioner Sir Mark Rowley reassured critics that the technology would be used without bias.
A Met spokeswoman said the force believes its use of the tool is "both lawful and proportionate, playing a key role in keeping Londoners safe".
Some 13 were arrested following positive identifications using live facial recognition
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On Friday, it was revealed that police had arrested 100 people to deter those they say "pose the greatest risk" to the safety of Notting Hill Carnival.
Some 21 people were recalled to prison, and 11 firearms and more than 40 knives were seized as part of "intelligence-led interventions" by Metropolitan Police.
Commander Charmain Brenyah, the force’s spokeswoman for the event, said around one million people are expected to be on the streets of west London.
Ms Brenyah said: "Our policing plan makes tackling serious violence a priority, which is why we’ve carried out intelligence-led interventions against those groups and individuals who we have reason to believe pose the greatest risk to the safety of other carnival-goers.
"We hope that this police activity will be a significant deterrent for those who otherwise might have been planning to come and engage in violence and other criminality."
Around 7,000 police officers will be on duty across the capital on both days of the Carnival.