Aam Aadmi Party's office in Kaushambi was vandalised today by workers of an outfit calling itself the 'Hindu Raksha Dal'. A group of 30 to 40 people attacked the party office in Kaushambi. "We managed to get all the volunteers inside the office in the nick of time. The attackers were hurling abuses, threw bricks at the office and attacked our members with sticks. They damaged the office and broke window panes," said a volunteer present at the office.