The print edition of the Chicago Tribune was published Saturday without paid death notices and classified ads, while in other markets a similarly slimmed-down version of the Saturday newspaper will be delivered on Sunday, the company said.
In a note posted on the Union-Tribune's website, Light described a computer virus that affected the computer systems for Tribune Publishing, the media company that used to own the Union-Tribune and now owns multiple newspapers including the Chicago Tribune, The Baltimore Sun and the Orlando Sentinel.
They all share the software systems of the Tribune Publishing media company, which formerly owned the Los Angeles Times.
A request for comment from Tribune Publishing was not immediately returned.
"We apologize to our customers for this inconvenience", Light wrote.
"Technology teams from both companies made significant progress against the threat, but were unable to clear all systems before press time", Light wrote.
The Los Angeles Times, which runs the facility, said the computer virus infected systems that are associated with the printing process.
A malware attack that appears to have originated outside the U.S. delayed the hardcopy distribution of several major newspapers, according to a report. Thank you for your patience and support. An FBI spokeswoman was not immediately aware if the incident had been reported to her agency.
New York Times and Palm Beach Post readers in South Florida also failed to receive their Saturday editions because the Sun-Sentinel also prints those newspapers. "It's serious attacks, not small stuff anymore".