The dpa news agency reported Wednesday that Dresden prosecutors accuse Petry of lying under oath when she testified before Saxony's regional assembly in November 2015 about loans to the right-wing Alternative for Germany party.
Lawmakers in Saxony lifted Petry's immunity in August. The 42-year-old welcomed the decision at the time, saying it would give her a chance to defend herself in court.
Petry, one of 94 AfD candidates elected to the national Parliament last month, has since quit the party.
She cited months of in-fighting among its leadership, saying AfD wasn't in a position to push for the political change that she thought Germany needed.
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