The FIR against AAP Legislator Naresh Balyan was filed at Uttam Nagar police station.
An FIR was filed today by a former AAP volunteer against the party's Uttam Nagar legislator Naresh Balyan, one of whose supporters in turn filed a cross FIR in an assault case.
The cross FIRs have been filed at west Delhi's Uttam Nagar police station.
In his FIR, the former AAP volunteer and president of Mohan Garden RWA Henry George has accused Mr Balyan and his associates of trespassing his office, attacking him and issuing threat to his life this afternoon, police said.
A case has been registered against Mr Balyan under sections 323 (voluntarily causing hurt), 341 (wrongful restraint), 451 (assault) and 506 (criminal intimidation) of the IPC, Vijay Kumar, Deputy Commissioner of Police (West), said.
Also, a case has been registered against Mr George on the basis of a complaint by one of the legislator's associates.
He has accused Mr George and his aides of abusing and assaulting the legislator and his supporters who were passing from near his office.
The case against Mr George has been registered under sections 323, 341 and 506 of the IPC.
Mr Kumar said no one has been arrested so far and the probe is underway.