The Philadelphia Inquirer skilled probably the most vital disruption to its operations in 27 years as a result of what the newspaper calls a cyberattack.

The corporate was working to revive print operations after a cyber incursion that prevented the printing of the newspaper’s Sunday print version, the Inquirer reported on its web site.

The information operation’s web site was nonetheless operational Sunday, though updates have been slower than regular, the Inquirer reported.

Inquirer writer Lisa Hughes mentioned Sunday “we’re at the moment unable to supply an actual time line” for full restoration of the paper’s methods.

“We recognize everybody’s persistence and understanding as we work to completely restore methods and full this investigation as quickly as potential,” Hughes mentioned in an e-mail responding to questions from the paper’s newsroom.

The assault was first detected when staff on Saturday morning discovered the newspaper’s content-management system was not working.

The Inquirer “found anomalous exercise on choose pc methods and instantly took these methods off-line,” Hughes mentioned.

The cyberattack has brought on the biggest disruption to publication of Pennsylvania’s largest information group since an enormous blizzard in January 1996, the Inquirer reported.

The cyberattack precedes a mayoral main election scheduled for Tuesday. Hughes mentioned the operational disruption wouldn’t have an effect on information protection of the election, though journalists could be unable to make use of the newsroom on election evening.

Hughes mentioned different Inquirer staff is not going to be allowed to make use of workplaces via at the very least Tuesday, and the corporate was wanting into coworking preparations for Tuesday, the Inquirer reported.

An investigation was ongoing into the extent and particular targets of the assault, and the corporate has contacted the FBI, Hughes mentioned.

The FBI in Philadelphia declined to remark in response to questions from Inquirer journalists, the newspaper reported.

Subscribe to Properly Adjusted, our publication full of straightforward methods to work smarter and dwell higher, from the Fortune Properly staff. Join at this time.