The BJP leader was safely escorted out of the area by the security personnel and central force officials after the incident.
Atishi on Thursday accused Gambhir, her BJP rival in East Delhi, of distributing pamphlets that questioned her morals.
Raj Narayan Mahto, Presiding Officer (PO) of booth 148, however, said that the EVM had developed some glitches which were resolved in an hour and the voting process could begin soon.
Sanjar's candidature is being seen as a precautionary measure by the BJP in case Thakur is prevented from contesting the elections.
Anarkali was believed to be a famous courtesan in Mughal emperor Akbar's court who had an affair with his son Jehangir.
He marked a copy of the letter to the Chief Electoral officer Telangana, Rajat Kumar, and the Election Commission of India.
Reacting to Khan's remarks, she tweeted that the NCW would also be requesting the Election Commission to bar him from contesting elections.
Asserting that he did not name anyone, the Samajwadi leader told ANI that he would withdraw his candidature from the ongoing polls if proved guilty.
The sister-in-law of the victim is contesting the gram panchayat polls on a BJP ticket.