"KCR celebrating and putting huge ads worth 100s of crores. Another Nero in celebration mode when poor people are dying. Shame on you KCR!", the party General Secretary said on Twitter.
Singh, who is in charge of party affairs in Telangana as also Andhra Pradesh, said, "In two years we have seen only KCR family benefiting. Farmers are committing suicides people are dying of heat stroke, unemployment growing."
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He also stressed that it was Congress Chief Sonia Gandhi who was instrumental in carving out separate Telangana from Andhra Pradesh.
"Greetings to all in Telengana and we thank Sonia Gandhi to give statehood accepting the long standing demand of the people of Telengana," he said.
The state of Telangana came into existence on June 2, 2014 as per the Andhra Pradesh Reorganisation Act passed in Parliament.
Late last month, Singh was also critical of the way the Narendra Modi government celebrated its second anniversary.