At least four people got injured after being stabbed in a brawl between Ku Klux Klan (KKK) members and counter-protesters in Anaheim, California.

Police said that thirteen people, both KKK members and rival demonstrators, were arrested. The police added that the situation turned violent when several members of the Klan gatrhered at a local park for a rally and were attacked by counter-protesters.

It is learned that one of the injured is in a serious condition. Police have also detained a Klansman who allegedly stabbed one of the demonstrators with a flag pole. Witnesses said the counter-protests had started hours before the arrival of KKK members at the park.

As the Klansmen started to unpack the demonstrators surrounded them and started attacking them. Local media reported that some demonstrators kicked a man whose shirt read "Grand Dragon", the name of a high-ranking KKK member.

Talking to reporters, Police Sergeant Daron Wyatt said: "One person was stabbed multiple times by one of the Klansmen it is believed with a flag pole. Not necessary.

A witness said that he helped a Klansman away from the crowd and asked him "how does it feel that your life was just saved by a Jewish man?"

The Ku Klux Klan is a very old and infamous hate groups in the US. The group has targeted African Americans, Jews, Catholics and immigrants, according to the Southern Poverty Law Center, which tracks hate groups. The group traces a long history in Anaheim, with KKK members elected to the city council in the 1920s.