Vietnam's consumer price index in September is estimated to have risen 0.97 percent from August, the highest month-on-month increase in seven months, a newspaper reported on Monday, citing government data.

The monthly increase is due to a hike in school fees, higher prices of electricity and medicine as well as more expensive healthcare service, the Vietnam Investment Review newspaper cited a Planning and Investment Ministry estimate as showing.

The ministry also forecast January-September's CPI would rise 4.5 percent from end-December 2012, below the 5.13 percent increase during the same period last year, the newspaper reported.

The government is due to release full inflation details later this week.