Canada's consumer prices rose 6.8 per cent year-over-year in April, a slight increase from 6.7 per cent in March, Statistics Canada said. The year-over-year increase in April was largely driven by food and shelter prices. Gas prices increased at a slower pace in April compared with March, moderating the acceleration of the all-items Consumer Price Index (CPI) in April, the national statistical office added on Wednesday. Excluding gasoline, the CPI rose 5.8 per cent year-over-year in April, after a 5.5 per cent gain in March. This was the fastest pace since the introduction of the all-items, excluding gasoline special aggregate in 1999, according to the agency.