Extra powers have been given to police to stop groups from gathering after a “violent disturbance” in Cardiff city centre.
From Sunday until Tuesday morning, officers will have the power to stop individuals and groups from congregating in the city centre for 24 hours.
On Saturday evening, six people were injured, including three with stab wounds after police received “multiple reports” of a violent incident in Queen Street. One person received serious head injuries.
A Taser was also used to detain one man who was allegedly obstructing officers responding to the incident. He is not believed to have been involved in the disorder.
Four teenagers, aged 16 and 17, have been arrested on suspicion of violent disorder in connection with the trouble and remain in police custody.
Get stories like this straight to your inbox with our newsletters.
Four people remain in hospital with varying injuries which, while serious, are not thought to be life-threatening. You can follow our live updates here.
Find out about crime levels where you live:
Police are now urging parents who believe their child was involved in the incident to come forward.
A dispersal order is in place allowing police to turn away anyone in the city centre if their behaviour is likely to “contribute to disorder or cause harassment, alarm or distress to members of the public”.
South Wales Police Detective Superintendent Esyr Jones said: “This was a violent and completely unacceptable incident which has understandably caused alarm within the local community.
“A team of twenty detectives are currently investigating the incident, trawling through vast amounts of CCTV and speaking to a number of witnesses, and I want to reassure the public that we will be relentless in identifying and arresting all those involved.
“This appears to have been an isolated incident involving local youths, all of whom can expect to find officers knocking at their doors as enquiries progress.
“We work closely with a wide range of partners to ensure that incidents of this nature are rare, and the public should be assured that Cardiff remains a safe place in which to live, work and visit.
“We are continuing to appeal to anyone who witnessed the incident or who has information which could assist the investigation to come forward. In particular, I’d urge any parent who suspects their child was involved in any way to come forward. Tackling knife crime is the responsibility of us all and any parents who have suspicions about their children being involved are not protecting them by remaining quiet.”