Organizers of an extreme right-wing "free speech" rally in Boston announced on Twitter that Saturday's rally was being canceled, as local officials said there is no room for hate in the city.

Rally organizers said the city had revoked their permit, but city officials said no permit was ever applied for.

Boston Mayor Marty Walsh, Gov. Charlie Baker and top public safety officials from the state and city held a press conference on City Hall plaza Monday to discuss the planned Boston rally.

Walsh said his message to hate groups is: "Boston does not welcome you here, Boston does not want you here, Boston rejects your message." Walsh said the city rejects racism, white supremacy, anti-Semitism, terrorism, neo-Nazism and hatred.

Walsh said he planned to try to keep the group out of Boston. "We'll do anything in our power to keep hate out of our city," Walsh said.

The "Free Speech Rally" was scheduled to be held a week after a white nationalist rally in Charlottesville, Virginia, culminated in violence, with an alleged Nazi sympathizer driving a car into a counter-protest, killing one woman and injuring 19 people.

The Boston group claimed to be distinct from the Charlottesville group, although it appeared to have some similar speakers and supporters.

Monday on Twitter, organizers said the rally was being canceled because the City of Boston denied them a permit.

However, both Walsh and Boston Police Commissioner William Evans said the group never applied for a permit. Evans said the police were still trying to figure out exactly who the organizers were, and they appeared to be different from the group that held another free speech rally in Boston in May.

Walsh said he planned to ask organizers to postpone their rally because of the Charlottesville incident. "Emotion and wounds and pain is very fresh from what happened in Virginia," Walsh said.

Walsh and Evans said if the group did come, the city would be open to free speech but would not tolerate violence or incitement to violence, threatening behavior or vandalism.

Evans said the police were prepared to work with the organizers to define the parameters of any permit and make sure the protesters remain safe. However, he said rally organizers never applied for a permit or contacted the police or the city.

While a permit is not needed to assemble on Boston Common, it is needed to use a stage or amplifier or to march in the streets.

Evans said the police have a good plan in place to keep both the free speech ralliers and anticipated counter-protesters safe and in separate areas. "We're often as police officers thrust in middle of protecting groups we don't necessarily agree with," Evans said. "That can be the case on Saturday when this group wants to come to Boston Common."