REYKJAVIK, ICELAND—Members of the Icelandic band Sigur Ros have been charged with tax evasion, three years after local authorities launched a probe into the avant-garde rock band’s finances.

The indictment, issued by the District Prosecutor on Thursday, accuses the prominent musicians in the Nordic nation of submitting incorrect tax returns from 2011 to 2014, evading a total of 151 million Icelandic Krona ($1.2 million (U.S.)).

Band members fault their former accountant and say they have co-operated with tax authorities after learning about his mishandling. In a statement Thursday, the band vowed to clear its name and said it “regrets seeing the case end up in court.”

A court date has not been set.