The Federal Election Commission temporarily took its online services offline following a reported hacking attempt, disrupting campaign finance disclosures during the final week before the Nov. 3 midterm elections.

The FEC confirmed Tuesday that its electronic filing system was unavailable while technology staff worked to restore service. The outage began around 10 p.m. Eastern time Monday, according to a status notice posted by the agency, and officials had not announced a restoration time.

“At this time, the FEC’s electronic filing system is currently offline, and our IT staff is actively working to restore service,” the commission said in a statement to Reuters. The agency declined to provide additional details.

The electronic filing system is used by federal candidates, political party committees and political action committees to report campaign contributions and expenditures. The FEC website also provides public access to previously submitted financial disclosures, allowing voters and researchers to track political fundraising and spending.

The disruption comes at a critical point in the election cycle, when campaigns and outside political groups are making final spending decisions and reporting required disclosures. Certain independent expenditures must be reported within 24 or 48 hours during the closing days of a campaign, making access to the system particularly important before Election Day.

The reported cyber incident has raised questions about the security and availability of a federal system responsible for collecting and publishing campaign finance information. However, the FEC has not publicly identified a suspected attacker or disclosed whether any information was accessed, compromised, or stolen.

The Cybersecurity and Infrastructure Security Agency and the FBI did not immediately respond to Reuters’ requests for comment. The FEC also has not provided a timeline for restoring its electronic filing services.

The commission enforces federal campaign finance laws and makes political spending records available to the public. It does not administer elections, operate voting machines, or count ballots. The immediate impact of the outage is on campaign finance reporting and access to disclosure records, rather than the administration of voting itself.