Police officers were called to sort out a bust-up at a British science-fiction convention as rival groups of "Star Wars" and other sci-fi fans rowed, reports said Thursday.

An argument broke out at the fourth Norwich Sci-Fi and Film Convention, staged by the Norwich Star Wars Club, when members of the rival Norwich Sci-Fi Club showed up.

The convention, held at the University of East Anglia in Norwich, eastern England, on Sunday was a chance for fans to meet minor actors who played bit parts in the films.

When NSFC treasurer Jim Poole turned up to get a couple of autographs, a verbal altercation broke out between members of the two clubs, many of whom were in costume.

Poole said he turned up with two friends dressed as British TV character Doctor Who and another as comic superhero Judge Dredd.

"This wasn't a fight between Star Wars fans and Doctor Who fans with light sabres and sonic screwdrivers drawn," he said, according to the BBC.

"It's a bit sad and pathetic."

Police confirmed that they had been called to reports of an assault.

A police spokesman added: "After lengthy investigation, talking to witnesses and reviewing good CCTV footage, it was confirmed that there was no assault.

"The two rival groups were spoken to and advised to keep out of each other's way."

The convention reunited the four surviving actors who played bounty hunters in the "Star Wars" films for the first time, the Norwich Evening News local newspaper reported.

The next chapter in the "Star Wars" franchise will be produced in Britain, Disney's Lucasfilm announced earlier this month.

"Star Wars: Episode VII" will be the first in the series since Disney bought the studio from US film-maker George Lucas in 2012 for $4 billion. It is scheduled for release in 2015.