TOLEDO, OHIO ? A crowd protesting a white supremacists’ march Saturday turned violent, throwing rocks at police, vandalizing vehicles and stores, and setting fire to a bar, authorities said.

When Mayor Jack Ford and a local minister tried to calm the rioting, they were cursed for allowing the march, and Ford said a masked gang member threatened to shoot him.

At least 65 people were arrested and several police officers were injured before calm was restored about four hours later.

Ford blamed the rioting on gangs taking advantage of a volatile situation. He declared a state of emergency, set an 8 p.m. curfew through the weekend and asked the highway patrol for help.

Police are seen in a standoff with a group of protesters Saturday in Toledo, Ohio, where violence erupted between police and local protesters.

“It’s exactly what they wanted,” Ford said of the group that planned the march, which was canceled because of the rioting.

At least two dozen members of the National Socialist Movement, which calls itself “America’s Nazi Party,” had gathered at a city park to march under police protection. Organizers said they were demonstrating against black gangs they said were harassing white residents.

The violence broke out about one-quarter of a mile away along the planned march route shortly before it was to begin.

About 150 police officers chased bands of young men through the area. Officers wearing gas masks fired tear gas canisters and flash-bang devices designed to stun suspects, but the groups continued throwing rocks and bottles. At one point, the crowd reached 600 people, officials said.

Finally, police marched shoulder-to-shoulder down the street shouting to people to stay inside, and the crowd broke up.

At least 65 people were arrested, Police Chief Mike Navarre said. He said the white supremacists had left hours earlier.

The mayor had appealed to residents the night before to ignore the march. He said the city wouldn’t give the Nazi group a permit to march in the streets but couldn’t stop them from walking on the sidewalks.