The Forward Bloc also sought the creation of a separate state of Vidarbha and the establishing of the second State Reorganisation Committee to "find a justifiable solution on all pending demands of small states once and for all."
The decision to create Telangana "seems to have been impelled by the forthcoming Lok Sabha elections. It will give a fillip to demands for separate states in other places," the CPI(M) Politburo said in a statement here.
The party, which has been opposing the Telangana demand, said it has "always stood for the integrity of the states based on the democratic principle of linguistic states."
It accused the Congress and UPA government of taking a decision to divide Andhra Pradesh and creating Telangana "after long procrastination and more than two years after the report submitted by the Srikrishna Committee."
CPI(M) General Secretary Prakash Karat earlier said statehood for Telangana would spur such demands in other parts of the country.
"The central government will have to take the responsibility to see that there is no further division of states whether it is West Bengal or anywhere else. It should be made clear that you cannot go on having an endless division of a state or creation of new states," he said.
But CPI National Secretary D Raja termed the decision as "too late" and said his party had agreed to a separate Telangana "after indepth discussion and considering and exhausting all options".
"All regions of Andhra Pradesh should take this decision in a brotherly manner without any hostility or bitterness," he said.
Raja hastened to add that as a matter of principle, the Left is not in favour of creating smaller states but Telangana was a big region and the agitation for a separate state had been going on there for long.
RSP's Abani Roy said his party has been opposing the formation of smaller states, even when Jharkhand, Chhattisgarh and Uttarakhand were created.
"If the people want and the government agrees, then we don't have anything to do. But the demand for small states is borne out of the need for speedy development. However, our experience in Jharkhand and Chhattisgarh has shown that this is not happening. There is no development of the people in these tribal-dominated states," Roy said.
In a statement, the Forward Bloc supported the move but accused the Congress of delaying the process and "befooling the people of the region" for so long.
It also demanded that the government consider the demand for carving out a separate state of Vidarbha from Maharashtra, saying the "historical, geographical, cultural and social facts justify the demand."
Seeking the establishment of the second State Reorganisation Committee to "find a justifiable solution on all pending demands of small states once and for all," it said the government cannot ignore the demands of the people for separate states in a democratic and federal system.