The rise in inflation has been mainly on account of 31.44 per cent increase in prices of potato, 19.40 per cent in fruits and 12.75 per cent in rice, according to the official data on Wholesale Price Index (WPI) based inflation.
The food inflation stood at 9.50 per cent last month, while the manufactured inflation was 3.55 per cent.
Indicating that hard times are ahead, Barclays (India) Chief Economist Siddhartha Sanyal said: "The risks from a poor monsoon and uncertainties around global oil prices due to geopolitical tensions in Iraq remain".
The WPI inflation was 5.20 per cent in April and 4.58 per cent a year ago in May. The March inflation figures have been revised upwards to 6 per cent from 5.70 per cent.
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Expressing concern over spurt in food inflation, industry chamber CII said the government should implement APMC Act, develop advanced supply chains, rationalise subsidies, augment investment in agri-infrastructure and encourage FDI in retail.
Prime Minister Narendra Modi in his first address in the Lok Sabha last week had said: "We have promised to control inflation. We are determined achieve this target".
Meanwhile on the global front, worsening political situation in Iraq is pushing up the crude oil prices which will have a bearing on inflation.