Australia imposes night curfew in tourist town after violence

Northern Territory Police Commissioner Michael Murphy said "significant harm and civil disturbances" had occurred over the last 72 hours in Alice Springs.

The officers were attacked when they were walking home and it was not immediately known if the offenders identified them as police, Murphy told reporters.

The curfew will be in force from 10 p.m. to 6 a.m. local time.

Under new laws introduced in May, the police commissioner has the power to impose lockdowns for three days to control any violent incidents, and can ask the government for an extension.

"If I believe an extension is required I will put that in writing... about the reasons why I think that should occur," he said.

A two-week youth curfew was declared in March in Alice Springs after a mass brawl involving 150 people.

Community leaders have long identified alcohol abuse as a major factor behind violence.

Alice Springs, a remote town in Australia's vast outback region some 2,000-km north-west of Sydney, is the gateway to major tourist attractions including the giant red sandstone monolith of Uluru, formerly known as Ayers Rock.