At least seven people were injured – several of whom were stabbed – Sunday when friction between neo-Nazi and counter demonstrators in Sacramento turned violent.

Seven patients were transported to area hospitals, “some with critical trauma stab wounds,” the Sacramento Fire Department said.

The injuries were the result of what the fire department described as a “mass casualty event.”

No arrests had been made as of Sunday afternoon, but the original, permitted neo-Nazi rally was officially cancelled, ABC10 reported. That rally was to include factions from the Traditionalist Workers Party, Golden State Skinheads, Blood & Honor, National Socialist Movement and Ku Klux Klan, CBS reported.

The neo-Nazi group had planned a demonstration for several weeks, The LA Times reported, and counter protesters were evidently well organized and prepared for the event. Many carried signs or banners with slogans such as “Many colors one working class! Smash patriarchy and racism.” Several protesters had their faces covered with black cloth.

The clashes occurred near the State Capitol.

(Source: Fox News)