Two parties linked to a secret investigation into whether Gov. Scott Walker's campaign illegally coordinated with conservative groups in 2012 are asking a federal appeals court not to release any more documents in the case.

The request filed Saturday came after the 7th Circuit U.S. Court of Appeals' clerk mistakenly posted four documents online that weren't supposed to be made public.

The documents posted briefly Friday contained excerpts from emails showing Walker's recall election campaign team told him to instruct donors to give to a key conservative group that would run ads for Walker and distribute money to other groups backing him.

The unnamed parties are asking the court to keep secret remaining documents in the so-called John Doe probe. They say the disclosure "caused real harm to real people."