China's consumer inflation, measured by consumer price index, edged up in September, according to the National Bureau of Statistics on Tuesday.

CPI growth reached 2.5 percent last month, up from 2.3 percent in August. It was the highest level in seven months.

The rise in CPI was mainly caused by food price rises as a result of seasonal factors and natural disasters, the bureau said in a statement.

Producer price index, which gauges factory-gate prices, eased to 3.6 percent in September, down from 4.1 percent in the previous month.

The easing was mainly caused by the relatively high base in last September, the bureau said.