AAP leader Kumar Vishwas, however, alleged that right-wing forces including the BJP and the Sri Ram Sena was responsible for the attack.
The attackers vandalised flower pots and abused Dilip Pandey, an AAP leader, who was present on the spot. They also misbehaved with the women, sources in the AAP said.
They also threatened to attack AAP leaders in the future before leaving the spot, an IANS report said.
The attack was to protest Prashant Bhushan's remark on referendum in J&K
"All our volunteers were asked to get inside (the office) when the attack took place," Pandey said, adding the attackers raised slogans against a particular community. Sources said that the attack was carried out in protest against AAP leader Prashant Bhushan's recent statement on seeking a referendum on army rule in Jammu and Kashmir.
The AAP office at Kaushambi is located not far from the personal residence of Arvind Kejriwal, AAP leader and currently the chief minister of Delhi.