On March 8, Chandrababu Naidu-led TDP pulled out two ministers from the NDA government.
A week later, it broke away from the government and gave notice for a no-confidence motion against it.
BJP Chief Amit Shah wrote a nine-page letter accusing TDP of being guided "by political considerations instead of development concerns."
But Shah's letter was "full of false information," Naidu has said.
TDP-BJP ties have been fraught ever since Budget'18 when the southern party accused its ally of making "insufficient" allocations.
TDP lamented there was no mention of the promised Vishakhapatnam railway zone, allocations for construction of the new capital Amaravati, and the Polavaram multi-purpose irrigation project.
Most importantly, they demanded special category status, a decision announced in 2014 and endorsed by all parties including BJP.
BJP, seemingly keen to resolve the differences, had sent General secretary Ram Madhav to discuss issues with Naidu. Afterwards, Madhav had downplayed the goings-on, saying the issues weren't political but developmental, which can be solved through discussion. But TDP left the NDA soon after.
Responding to his complaints, Shah listed several of NDA's projects in Andhra in a letter to Naidu, saying the government was committed to Andhra's development.
He said TDP had hailed a special package offered in September'16, but "two years later, you have made a U-turn demanding special status."
Naidu should "introspect whether parties should be pitting sentiments...against each other to further their agenda."
Dismissing Shah's allegations, Naidu yesterday called his letter "a bundle of lies" and an insult to the people of the state.
"Shah says the Center gave many funds, we couldn't utilize them. Our government has good GDP, agriculture and many national awards. That is our capability. Why are you spreading lies?" he asked.
The "injustice" had deprived Andhra of its due benefits, Naidu said.
Love Politics news?
Subscribe to stay updated.