U.S. consumer inflation likely increased at its fastest pace in three years in May as the Middle East conflict raised prices of energy products, which would provide more ammunition for the Federal Reserve to keep interest rates unchanged this year. The anticipated third straight month of strong year-on-year Consumer Price Index readings from the Labor Department on Wednesday is expected to highlight mounting pressure on households as evidence suggests more consumers are dipping into savings to finance their spending. Inflation is likely to outpace wage growth in May for a second straight month, a development that could weigh on overall economic growth.