Inflation in crisis-prone Argentina accelerated more than expected and for a fifth straight month in January, the country's statistics agency said Tuesday, a closely watched report whose outdated methodology in recent days stoked political turmoil and created a headache for libertarian President Javier Milei.

Consumer prices rose 2.9% last month compared with December, said the statistics agency known by its Spanish acronym INDEC, largely owing to increases in the prices of food, restaurants, hotels and utility bills.