A 16-year-old boy who was arrested on Hove seafront shortly after two teens were stabbed has been released on conditional bail.
The child, who cannot be named for legal reasons, was held on suspicion of assault causing grievous bodily harm (GBH) with intent.
Another 16-year-old boy who was detained in Brighton on suspicion of assaulting an emergency worker has been released with no further action to be taken.
The pair were arrested as police were called out to deal with drunken groups of youngsters on the seafront in Brighton and along Hove Lawns.
They dispersed groups who were reported to have been causing a nuisance or behaving in an anti-social way on Friday evening (30 May) and into the night.
Yesterday (Saturday 31 May), Sussex Police said: “Police have increased patrols and engaged with local businesses in Brighton city centre due to concerns around potential youth disorder.
“Activity was increased throughout Friday (30 May), in response to local concerns.
“At around 7.30pm, police were called to the lower promenade, near Shelter Hall, to reports of a large group of youths gathering.
“Officers dispersed the group, while supporting a number of teenagers who appeared to be intoxicated and in a vulnerable state.
“A 16-year-old boy, from Brighton, was arrested at the scene on suspicion of assaulting an emergency worker. He remains in custody at this time.
“At 9.55pm, officers monitoring a group of youths gathered at Hove Lawns were made aware of two 18-year-old men having been stabbed.
“Both were taken to hospital for treatment to injuries not believed to be life-threatening.
“A 16-year-old boy, from Crawley, was arrested on suspicion of grievous bodily harm with intent and remains in custody at this time.”
Chief Inspector Vicky Dias said: “Everyone has the right to enjoy the summer weather in peace but social gatherings turning to criminal disorder is unacceptable and will be met with a robust response by our officers.
“I would like to reassure the public that an increased police presence will remain in Brighton city centre across the weekend, including extensive engagement with businesses and local residents.
“Last night’s incidents show how quickly anti-social behaviour can escalate into violence, with potentially tragic consequences.
“We and our partners will continue to work hard to address any issues as early as possible but I would also appeal to parents to be aware of their children’s behaviour and whereabouts to help keep them safe from harm.”