be brought within 3 years of the date of the last event constituting the alleged violation for which such action is brought. (C) Commencement In determining when an action is commenced under paragraph (3), (4), or (6) for the purposes of this paragraph, it shall be considered to be commenced on the date when the complaint is filed. (6) Action for injunction by Secretary The district courts of the United States shall have jurisdiction, for cause shown, in an action brought by the Secretary— (A) to restrain violations of section 7 (including a violation relating to rights provided under section 5), including the restraint of any withholding of payment of wages, salary, employment benefits, or other compensation, plus interest, found by the court to be due to employees or individuals eligible under this Act