The gasoline index largely drove the increase. That index rose 5.7%, and accounted for over two-thirds of the price increase across the entire CPI. Meanwhile, the food index fell by 0.1% in April. This is the first time the food index has fallen since June 2017.
Real average hourly earnings for all workers fell 0.1% in April. Even though the average hourly wage actually increased during this periods, the overall decline in the Consumer Price Index was enough to erode these wage gains.
Source: Bureau of Labor Statistics (1), Bureau of Labor Statistics (2)