"BJP and its ICON wants to deprive poor of Food Security in India, shows its true colour of being ANTI-POOR. Oppose all pro-poor initiatives.
"Modi doesn't trust BJP Parliamentary Party to raise right issues on Food Security Bill, writes directly to PM. No confidence against Sushma?," Singh commented on microblogging site Twitter.
His comments came a day after Modi wrote to the Prime Minister seeking a meeting of Chief Ministers on the food bill.
Reacting sharply to the barbs of Singh, BJP's Ravishankar Prasad said his party "condemns" the "low-level politics" by the Congress general secretary.
More From This Section
Prasad also took strong objection to a tweet by the Congress leader that suggested that BJP was instigating communal riots in non-BJP states.
"Digvijay Singh is known for making irresponsible statements. Hope that his party will clarify whether it was the party opinion or that of Singh. Hope Congress will definitely ask him," he said.
Singh had earlier tweeted in the morning "6 Communal Incidents in 2 months in Bihar, Communal Violence in Kishtwar, in Tonk Rajasthan. I had warned BJP shall target non-BJP States.