Carrying the banner of an outfit called Hindu Raksha Dal, around 35 people reached the party's office around 11.05 am raising slogans against party leader Prashant Bhushan for seeking a referendum on the army's presence in Kashmir during an interview with Aaj Tak on Sunday.
Bhushan's comment had drawn ire of several right wing outfits, including the Bharatiya Janata Party.
The attackers even tried to break open a door in the party office when the volunteers locked themselves inside a room to doge them. The miscreants ransacked the ground floor and left.
"We managed to take away the volunteers. No one was injured. Only office property has been damaged," said an AAP leader who was present in the office during the attack.
He said the attackers were carrying the banner of Hindu Raksha Dal.
"We have video footage of the attackers. AAP seeks immediate action against them," the leader said.
The attackers carried flags, banners, lathis and began hurling bricks and abuses at the AAP volunteers, many of them women.
"Had I been a second late, I would have been hurt. They had come to fight," said a woman volunteer of the AAP.
"Had we not locked the gate on time, many women would have been hurt since the attackers were throwing bricks," said another volunteer.
Police have reached the spot.
"The party never endorsed Bhushan's comments. Despite that, goons were sent to attack the AAP office. One party has been encouraging these groups. These are all inspired by the BJP. It is if they are the custodians of Hinduism. This is fake nationalism," said AAP leader Kumar Vishwas.