Two protest groups have been organised to oppose the controversial English Defence League demonstration planned in Leicester next month.
Police and local authority chiefs are in talks to decide how to deal with the potential of thousands of rival demonstrators arriving in the city centre on Saturday, October 9.
The English Defence League (EDL) says it expects about 3,000 of its members to attend the protest.
And now more than 1,000 people have signed up on Facebook sites opposing the EDL.
One of the campaigns, started by a group calling itself the Muslim Defence League, asks people to pledge to attend a counter protest. So far nearly 900 people have done so.
The other simply asks people to voice their objections to the EDL. It has been supported by 530 people.
Chief Superintendent Rob Nixon, head of police in the city, said: "We are aware of these plans and we're following developments closely. The situation can change daily or even hourly, and the police and our partners are staying on top of the situation."
The EDL states that it is opposed to Islamic extremism.
However, its critics say it is a far-right group whose demonstrations routinely result in violence.
The Muslim Defence League also has its own website on which it says the group was set up to "defend all races and religion".
It adds: "We are not a group that actively looks to engage the EDL in physical confrontation. If needs be we will defend Muslims and non-Muslims alike."
Suleman Nagdi, of the Federation of Muslim Organisations, said he had not heard of the group.
He added: "We can do without the EDL staging a demonstration in Leicester.
"It will be bad for the city, but the beauty of this country is that people have a right to demonstrate.
"However, while Muslims may be the main target of the EDL's march we have received letters of support from all faiths in Leicester who are opposed to their demonstration.
"I support any counter-demonstrations provided they are peaceful, however the federation has yet to form a view on whether we will take part in any of these."
The EDL has suggested it will bring up to 3,000 people to Leicester but has not yet disclosed if it will seek permission to march through the city or stage a static protest at a pre-agreed spot.
Leicester City Council has said it would seek to ban a march.
But the authorities are powerless to prevent the group staging a static protest in the city.
The council is negotiating with police and waiting for the group to declare its intentions before deciding its next move.
A spokesman for Leicester City Council said: "We are continuing to work in partnership with the police on the planning around this demonstration."