A total of 140 people have already been arrested on the first day of Notting Hill Carnival for offences including assaults on police, robbery and possession of weapons.
That is 40 per cent more than the number arrested on the opening day of the world-famous street party in west London last year, when 104 were detained.
It comes as the Met Police has vowed to crack down on crime at the event, deploying knife arches and live facial recognition cameras to locate people on watchlists.
In an update at 8pm on Sunday, the force said dozens of arrests were made on the opening day, including 15 for assaults on police.
It added that one of its officers who was attacked sustained injuries to their hand which required hospital treatment.
