A snap curfew will not be extended on Alice Springs after outbreaks of violence simmered down in the Northern Territory community.

NT Police Commissioner Michael Murphy said on Thursday there were no reasonable grounds to extend the ban on people under 18 entering the town’s CBD between 10pm and 6am.

The three-day curfew had been imposed as a “pressure-relief valve” for law enforcement officers after a string of violent incidents at the weekend, Chief Minister Eva Lawler said at the time.

Renewed clashes in Alice Springs had threatened to extend the curfew, with police arresting five people on Wednesday following a feud in the town’s centre.

But Murphy said he was confident police resources were adequate to respond to any further instances of crime or anti-social behaviour.

“The declaration has had a noticeable effect in preventing public disorder within the CBD and I would like to thank the Alice Springs community for working with us,” he said in a statement.

“The violent disturbances we saw yesterday outside of the Public Disorder Declaration operational hours, involving up to 100 people, will not be tolerated.

“Five arrests have already been made and every instigator of that disturbance can expect to be charged.”

Alice Springs Mayor Matt Paterson said the curfew had worked to reduce violent incidents but called for longer-term solutions to address issues in the community.

“This is 30 years of policy on the run that’s got Alice Springs and central Australia to where we are, and it’s decisions driven out of Canberra and Darwin,” he told ABC TV.

“There is a vision for a long-term plan, and I think that that is welcomed.

“But what we need to do is speed that process up, because there will be no requirement for a long-term plan if these things continue in Alice Springs, because it will drive good residents out of the community.”

The incidents that sparked the curfew included a brawl involving about 80 people that related to the death of a teenager in a car accident in March.

The 18-year-old’s death sparked violent recriminations between families and an initial three-week curfew.

Prime Minister Anthony Albanese said tensions had flared up again by young people drawn into town during school holidays.

“When I visited Alice Springs recently, what they indicated was that the curfew that had been imposed had worked, and the current curfew which has been imposed has made a difference as well,” Albanese said.

Under controversial laws passed on urgency in May, the police commissioner can call a snap curfew but only the police minister can extend it upon the commissioner’s request.

NT Police confirmed about 5000 people travelled to Alice Springs in recent weeks for school holidays, the Alice Springs Show and NAIDOC Week.