The CPI-M Tuesday asked the government to slash the prices of diesel and petrol.
"There has been a sharp fall in the international prices of oil. At present, crude oil price has gone below $90 a barrel," the Communist Party of India-Marxist said in a statement.
"Despite this, the (Narendra) Modi government has not reduced the prices of diesel at any stage. The retail price of petrol also needs to be reduced further," it said.