Authorities say Ku Klux Klan members and counter-protesters involved a bloody melee at a Southern California park have been released from jail without criminal charges.

But police Sgt. Daron Wyatt said Thursday that it's possible they could be arrested again after investigators review video footage and other evidence from the weekend clash in which three people were stabbed.

Wyatt says 12 people were arrested and one turned himself in following Saturday's brawl involving several dozen people and spanning an Anaheim city block about 3 miles from Disneyland.

An initial investigation determined that Klan members acted in self-defense after the counter-protesters attacked.

Wyatt says a 19-year-old man arrested after the melee remains jailed on a matter unrelated to the brawl.