Tripura Chief Minister Manik Sarkar Wednesday attacked the BJP for describing people from the northeast living in Delhi as "immigrants" -- a folly the BJP later rectified."The northeastern states are an integral part of India. Those people from northeastern states staying in Delhi are also citizens of India," he told reporters. Sarkar, a leader of the Communist Party of India-Marxist, said: "Why should people from northeastern states residing in Delhi be treated as immigrants? This is an absolutely wrong notion."A 24-page Vision Document released Tuesday by the Bharatiya Janata Party ahead of Saturday's Delhi elections pledged to protect "immigrants" from the northeast living in the capital.