Cross FIRs were lodged against 30 people, including Aam Aadmi Party leader Kumar Vishwas and a Congress leader after an altercation between activists of both the parties, at Peparpur police station in the district.
Police said on the complaint of a representative of Vishwas an FIR was lodged against 15 people including UPCC member Munna Singh.
An FIR has also been lodged against 15 AAP workers, including Vishwas, on the complaint filed by Singh, they said.
District Superintendent of Police Heera Lal said necessary action would be taken after a probe.
Reacting on the incident, Vishwas said if police do not take action within two days then he would gherao the police station.
Munna, on the other hand, accused the AAP leader of creating an atmosphere of anarchy in Amethi and said his allegations against Congress were baseless.
According to sources, the altercation started after Congress activists objected to AAP workers' slogan, "Abhi to Sheila (former Delhi CM) haari hai, Ab Rahul ki baari hai (Sheila has been defeated, now it's Rahul's turn)", during a 'jhadu yatra' yesterday. This led to a verbal duel between the activists of Congress and AAP.
However, the AAP leader had alleged that the Congress activists, led by Singh, attacked them at Thishundi village of Amethi's Vadar development block, and threatened to kill them.