"In my view, the way the amendment has been brought to the AP Reorganisation bill by the NDA government is one-sided, unconstitutional and undemocratic. It is unconstitutional because the process of the division of the state came to an end on March 2," Reddy told reporters here.
A controversial bill that paves the way for the Polavaram project in Andhra Pradesh by merging some villages and mandals of Telangana with Seemandhra was approved in the Lok Sabha on Friday.
"If there is further amendment to the borders of the state, it has to be started under Article 3 and 4. The amendment is, therefore, not only undesirable but constitutionally invalid," Reddy added.
Article 3 deals with the formation of new states and the alteration of areas, boundaries and names of existing states.
Asked about the next course of action by Telangana Congress MPs in the Rajaya Sabha, Reddy said he was not aware of it.