The meeting is being held at a time when Congress ministers from Rayalaseema and coastal Andhra have already reached here to pursue the united Andhra Pradesh cause.
Chief Minister N Kiran Kumar Reddy, state Congress chief Botsa Satyanarayana and Deputy Chief Minister C Damodar Raja Narasimha are also expected to be here tomorrow.
The Congress Core Group had discussed the Telangana issue earlier this month and decided to refer the long-pending matter to the Congress Working Committee for a final view.
Meanwhile, amid talk that Congress leadership may take a decision in favour of separate Telangana, a ruling Congress MLA and two YSR Congress legislators from non-Telangana regions today said in Hyderabad that they have "resigned" from their posts in support of the united Andhra Pradesh cause.