"FDI in retail will lead to social unrest. Don't create a situation which has the potential to trigger social unrest," he said.
Mahtab said allowing foreign direct investment in multi-brand retail would also lead to a flood of goods from low-cost countries like China and Bangladesh.
"We opposed FDI in retail in 2004 and we oppose it now," he said.
Trashing the government's claim that allowing FDI in retail will check wastage of food, Mahtab said: "It is unfortunate the government is using lack of facility for storage as a shield to bring in FDI.