Even as it defends against a shareholder lawsuit alleging a failure of internal controls to address safety issues at its stores, Dollar General has been cited for another $3.4 million in penalties by federal regulators.

The latest citations of stores in Maine, Ohio, North Dakota and Wisconsin bring to $21 million in proposed penalties assessed against the Goodlettsville, Tennessee-based company since 2017.

That's up sharply from the $15 million total as of February.