New Delhi: Terming the double-digit food inflation as "disturbing", Finance Minister Pranab Mukherjee on Thursday said supply of food items needed to be improved to deal with the price rise.

"Food inflation has gone up ... This is really disturbing," he told reporters here.

His comments came after data showed that food inflation touched the double-digit mark after a gap of over five months. It was at 10.05 percent for the week ended on August 20, as onion, fruits, vegetables and protein-based items turned more expensive.

"Inflation is always a matter of concern and we shall have to ensure and improve the supply of food items," Mukherjee said.

As per the official data released on Thursday, prices of onion soared by 57.01 percent year-on-year, while that of potato by 13.31 percent during the week under review.

Fruits became dearer by 21.58 percent and vegetables overall by 15.78 on an annual basis.

The prices of egg, meat and fish were up 12.62 percent, while milk and cereals became dearer by 9.22 percent and 4.64 percent, respectively.

Commenting on the latest numbers, Planning Commission Deputy Chairman Montek Singh Ahluwalia also expressed concern, but said seasonal factors have a role to play.

"Inflation is a worry... If you see the data, last year at this time food prices went down and then rose again. So, I would not be surprised of prices rise a little bit," Ahluwalia said.