U.S. consumer prices rose for a second straight month in March as the cost of gasoline and shelter increased, signs of some inflation that should keep the Federal Reserve on course to start raising interest rates this year. The Labor Department said on Friday its Consumer Price Index increased 0.2 percent last month after a similar gain in February. In the 12 months through March, the CPI slipped 0.1 percent after being unchanged in February. March’s price gains are likely to bolster the Fed’s long-held view that inflation will gradually move towards the U.S.