Italy’s financial police raided the branches of Swiss banks around the country on Tuesday in a growing clampdown on tax evasion that is causing friction between the Swiss and Italian governments.

The Guardia di Finanza, accompanied by tax inspectors from the Agenzia delle Entrate, Italy’s equivalent of the Internal Revenue Service, visited 76 Italian branches of Swiss banks to ensure that they were providing “correct and timely information” to the tax authorities, the two agencies said.