Former Attorney General Eric Holder and dozens of other former federal prosecutors have signed a letter critical of FBI Director James Comey.

The letter obtained Sunday by The Associated Press says Comey broke from Justice Department policy when he alerted Congress to the new discovery of emails potentially related to the Hillary Clinton email investigation.

That policy is meant to prevent the appearance of prosecutors affecting the electoral process.

The ex-prosecutors say in the letter that Comey’s disclosure has “invited considerable, uninformed public speculation” about the significance of the emails.

Comey has said he felt obligated to notify Congress about the existence of the new emails given his past public statements that the investigation had ended.

The former prosecutors say in the letter the American public deserves more information.