At least 52 convicted felons have received routine unauthorized access to military installations in recent years, according to a federal watchdog report on security at several U.S. Navy installations set for release in the coming days.

The findings by the Defense Department Office of Inspector General are part of an audit of the Navy’s procedures for granting access to bases. The audit reviewed security operations at Navy installations in Virginia and the District, including the Washington Navy Yard, according to a summary of the audit posted in the agency’s August newsletter. The summary does not provide details about the findings, but inspector general investigations are typically launched in response to a credible report of lapses or wrongdoing.

Draft copies of the audit were shared with some congressional offices on Monday just hours after the mass shooting at the Washington Navy Yard. A congressional aide who has seen a copy of the draft audit said that the report mentions that at least 52 convicted felons had access to military installations. The aide declined to share more details on the report pending its release, but said it should become public “in the near future.”

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