Harikrishna, who displayed his resignation letter to the media, alleged that the Congress leadership announced the division without resolving the crucial issues like water sharing.
He offered tributes at the 'samadhi' of late N T Rama Rao here today.
Accusing the Congress of dividing Andhra Pradesh only to serve its political interests, five MPs of Telugu Desam Party (TDP) have already resigned from their posts.
The MPs -- Y Satyanarayana Choudary, C M Ramesh (both Rajya Sabha), Nimmala Kistappa, Konakalla Narayana and Modugula Venugopal Reddy (Lok Sabha) -- said they were resigning in protest against the "injustice" being meted out to (new) Andhra Pradesh through the division.
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Harikrishna had written an open letter to people on August 2 on the division issue of the state.
"I bow my head to the wishes of people of Telangana and accept the bifurcation of the state. The TDP is not against bifurcation but Sonia Gandhi has left one eye bleeding blood by not addressing the concerns of people of Andhra-Rayalaseema," Harikrishna lashed out.