TDP's YS Chowdary, who quit as the Minister of State for Science and Technology along with Civil Aviation Minister Ashok Gajapati Raju, told reporters that it wasn't that the centre hadn't given funds for Andhra Pradesh. But "the major emotional and sentimental issue of special status for Andhra Pradesh was not addressed," he said.

Both, however, underlined the TDP remains part of the BJP-led national alliance NDA, saying any decision to sever ties will be taken by Chandrababu Naidu. The TDP has 16 MPs in the Lok Sabha and four in the Rajya Sabha. TDP lawmaker Ravindra Babu had earlier told NDTV that the next "logical step" for his party is to exit the alliance.

"PM Modi told us that he was with the people of Andhra Pradesh," Mr Chowdary said. In his resignation letter, the TDP lawmaker had attributed the step to "prevailing public sentiment" and "the circumstances that led to that situation" back home, a cryptic reference to the special status demand.

The BJP's four-year-old alliance with the TDP was brought to breakpoint when Chandrababu Naidu called a press conference on Wednesday night to announce that he was pulling out his ministers, hours after Finance Minister Arun Jaitley ruled out "special status" to Andhra Pradesh.

Soon after Mr Naidu's announcement last night, BJP chief Amit Shah spoke to the party's Andhra Pradesh chief K Hari Babu instructing him that the BJP's ministers in the state government, Srinivasa Rao and T Manikyala Rao, must resign. They resigned on Thursday morning.

"I went to Delhi 29 times, met Prime Minister and Central Ministers and requested them to fulfil our demands," Mr Naidu said on Wednesday. "When the intended purpose (of joining the Union Cabinet) has not been served, there is no point in continuing. For me the sole agenda is to safeguard the interests of the state."

Not only was he upset that he was unable to speak to the Prime Minister when he called, Mr Naidu described as "hurtful and insulting" Mr Jaitley's comments as he explained why the centre cannot give Andhra Pradesh "special category status."

Arun Jaitley had said that the centre was happy to give funds to Andhra Pradesh, but cannot give it special status as that scheme was scrapped by the 14th Finance Commission for all states except the north east and hill states.

"The centre cannot say now that all the funds that I have will now be given to the states and I have no money because after all the security of India is a Central responsibility," said Mr Jaitley. Mr Naidu alleged Mr Jaitley suggested that the TDP was "asking for money at the expense of the country's Defence Budget... Jaitley spoke like we asked for all the money. We felt insulted."