TASMANIA Police Inspector John Ward last night congratulated the Launceston community for its behaviour during Operation Unite.
Inspector Ward said 16 to 20 members of the Northern division participated in the program, which aimed at reducing crime in built-up areas.
"Friday night was the exception, there were no arrests made," Inspector Ward said.
"Saturday night was a bit different.
"Crowds were reasonably well behaved until 1am, when several arrests occurred as a result of drunken anti-social behaviour."
Four arrests were made on the night, including one for an assault, another for failing to follow police directions, a trespassing offence and another for urinating in public while in possession of a knife.
"Three move-on notices were given, and six vehicle infringement notices were issued," Inspector Ward said.
He said complete figures were not available for this year, but offences were fewer than last year's 88 arrests.
"I think probably the weather helped on Saturday night," Inspector Ward said.
"It certainly poured down between 10pm and midnight, which probably put a lot of people indoors or people went home.
"I think another point is that people are heeding the warnings.
"We give a clear message when we are running Operation Unite."
He said the message was that if people were intentionally going out to play up, they'd be locked up.Operation Unite is held annually across Australia as part of a combined police effort to reduce crime in built-up areas.