The Times, which was also affected by the attack, quoted a "source with knowledge of the situation" saying the attack was meant to disable infrastructure, rather than steal information.
According to a statement from Marisa Kollias, a spokeswoman for Tribune Publishing Company, the company's computer alert systems detected the presence of malware that impacted some back-office systems which are primarily used to publish and produce the newspapers.
"We believe the intention of the attack was to disable infrastructure, more specifically servers, as opposed to looking to steal information", the individual said.
A cyberattack on the Tribune Publishing Company's computer system led to printing and distribution problems at major newspapers. "We apologize to all of our readers for the inconvenience", it said.
Tribune Publishing said in a statement Saturday that "the personal data of our subscribers, online users, and advertising clients has not been compromised". Teams from both companies were making progress against the virus, but weren't able to fix it before the newspapers went to print.
As outage affecting 911 calls continues, FCC launches an investigation
So far, Missouri , Idaho , Arizona , Colorado , New Mexico, parts of Montana, and MA have seen some sort of impact. A Nationwide outage reaching from NY to California has been causing headaches since early Thursday morning.
The Accidental Prime Minister trailer talk
The party and its government in Madhya Pradesh was also quick to deny reports that the movie would be banned in the state.
Ricardo Pereira scores stunning victor for Leicester against Manchester City
Kevin De Bruyne and Sergio Aguero both came off the bench against Palace after dealing with injuries over the past few weeks.
The report said it could not provide firm numbers on how many subscribers were impacted, but a majority of LA Times customers received their papers on Saturday morning, albeit several hours late. Tribune Publishing sold The Times and The San Diego Union-Tribune to Los Angeles businessman Dr. Patrick Soon-Shiong in June, but the companies continue to share various systems, including software.
Inc., said it was also affected. At The Baltimore Sun, for example, the usual comics and puzzles were not included in Saturday's print edition, the paper tweeted.
Saturday editions of suburban Chicago newspapers the Lake County News-Sun and Post-Tribune will also be among those to be delivered on Sunday.
A Tribune Publishing spokesperson didn't confirm the ransomware infection, but did say the incident was caused by "malware".