The decision by the agitating farmers to hold another round of talks with the government was taken at a meeting of Sanyukt Kisan Morcha (SKM), an umbrella body of 40 farmer unions.
The phone number mentioned in the complaint is under surveillance and efforts are on to identify the caller, the police told PTI.
Rakesh Tikait, BKU Spokesperson said that farmers, who been agitating on different borders since November 26, have decided they won't go back till the government repeals all 3 farm laws.
Farmers' protests: Unions to decide on their response to centre’s letter today; urge Bihar counterparts to join stir
In the letter, the Central government has asked the unions to discuss its proposal and convey a date for another round of talks.
At Tikri boder, widows, sisters, mothers of farmers join protest; Jaipur-Delhi highway remains partially blocked
At the protest site near the Delhi border, the women carried the pictures of their male family members who had ended their lives after being caught in the dept trap.
Farmer unions, most of them from Punjab, have started their hunger strike against the Centre's new farm laws.
The plea said that till date, farmer leaders and the nominees of the Central government have held talks six times but "no fruitful purpose" has been served.
The warning from the farmer leaders came even as Union Agriculture Minister Narendra Singh Tomar and Commerce Minister Piyush Goyal on Thursday urged them to give up the protests.
Farmers vs Centre: Protestors to decide further course of action after discussing government's draft proposal
All India Kisan Sabha General Secretary Hannan Mollah said all major farmer leaders are scheduled to meet at 12 noon at the Singhu border to discuss the further course of action.
Farmer unions warned the state governments that any effort to stop them en route to Delhi would result in blockades as they are arriving prepared with four months of rations.
State home minister Anil Vij had denied that force was used to disperse the farmers, but senior JJP leader and Deputy Chief Minister Dushyant Chautala said the incident will be investigated.
The incident took place at a school in Ferozabad's Rajwali area under Narkhi police station on Saturday.
Protesting fuel price hike, farmers not to supply milk, vegetables in cities across India from June 1 to 10
If one has to buy any of these commodities one will be have to go to the villages and buy them at the rates farmers demand.