Bernanke said that the "upside risks to the inflation outlook have intensified lately, as the rising prices of energy and some other commodities have led to a sharp pickup in inflation and some measures of inflation expectations have moved higher."

Bernanke's comments underscored the bind the central bank is in, caught between a faltering economy that is struggling to overcome a prolonged housing slump and a severe credit squeeze, and the risk that inflation would move higher.

Many analysts believe that the central bank is likely to leave interest rates unchanged for the rest of the year out of concern that any tightening of credit policy could send the economy into an even worse tailspin.

Over the past 12 months, consumer inflation is up by 5 percent, the largest year-over-year gain since a similar 5 percent rise in May 1991.

Food prices also showed a big increase in June, rising by 0.7 percent, more than double the 0.3 percent increase of May. Vegetable prices shot up by 6.1 percent, the biggest increase in nearly three years.

Core inflation, which excludes energy and food, showed rising pressures too with an increase of 0.3 percent in June, up from a 0.2 percent gain in May and the biggest one-month rise since January.

This increase reflected a 4.5 percent jump in airline ticket prices, the biggest one-month rise for airline fares since March 2000.

(Chinadaily.com.cn via agencies July 17, 2008)