AAP City President Harpreet Singh and rural region chief Jayaji Suryavanshi said a group of hoodlums forcefully entered the party office and asked them to stop their ongoing membership drive.
They then broke the AC, television set, furniture and others items kept in the premises and fled from the spot, Suryavanshi said, adding the vandals also abused the AAP workers manning the drive.
Suryavanshi said he suspects the attackers were members of Nationalist Congress Party (NCP), which, however, denied any role in the violence.
NCP city chief Mushtaq Ahmed, when contacted, said "no party worker was involved in this act of violence. This is nothing but a plan to defame the party which is going great guns in the state."
NCP is part of the Congress-led ruling coalition in Maharashtra.
Police said they have registered an offence against unnamed people in connection with the incident in Mill Corner area here in Central Maharashtra but no arrest has been made.