Amazon.com Inc. warehouse workers in the U.S. are getting hurt at a higher rate than the industry average, according to an investigative report.

The rate of injuries contradicts more rosy assertions the company has made to lawmakers and the public, the Center for Investigative Reporting wrote in an article published on Tuesday.

The report, published on CIR’s Reveal site, cites internal safety reports and weekly injury numbers from Amazon’s nationwide network of fulfillment centers. Workers are more likely to get hurt at heavily automated facilities and during busy periods, such as Prime week and the holiday shopping season, according to the report.

At a warehouse in DuPont, Washington, the rate of injuries was 22 per 100 workers, Reveal said, adding that the injury rate was five times the industry average.

It’s the latest indictment of Amazon’s warehouse safety record. The company was fined by federal safety regulators for failing to report at least 26 work-related illnesses and injuries in a New Jersey warehouse in 2015. The company was also dinged for hiring medical personnel who provided services beyond their expertise when tending to workers’ medical needs.

Reveal reported that although the company called out select warehouses with the highest rates of injuries in internal reports, it didn’t propose reducing the workload for its workers, which would have risked delaying orders.

The Seattle-based company has often touted the tens of millions of dollars it has invested to improve safety practices. Monthly, Amazon officials send detailed updates to warehouse safety managers across the country to monitor the company’s progress. But internal data revealed that not only did Amazon fail to meet its own targets, but that the injury rate ticked up.

Amazon told workers the robots would make their jobs easier, Reveal reported, but instead automation prompted the company to jack up the number of products workers handled each shift. For instance, workers in traditional warehouses were expected to grab and scan about 100 items per hour, the report said. Workers in robotic fulfillment centers, meanwhile, were expected to reach as many as 400 items an hour.

“If you’ve got robots that are moving product faster and workers have to then lift or move those products faster, there’ll be increased injuries,” Kathleen Fagan, a medical officer for the federal Occupational Safety and Health Administration (OSHA), told Reveal.

In 2015 OSHA issued a hazard alert letter citing a robotic Amazon warehouse in New Jersey. It said: “The company exposed employees to ergonomic risk factors including stress from repeated bending at the waist and repeated exertions, and standing during entire shifts up to 10 hours, four days a week and sometimes including mandatory overtime shifts.”

The federal agency recommended solutions such as mandating extra rest breaks or rotating employees to different tasks but Amazon still prioritized productivity over safety, the report said. By the end of 2016, the company’s robotic warehouses had higher rates of injuries than traditional ones.

An Amazon spokesperson told Reveal the company values employee safety. “Nothing is more important than the health and safety of our teams. So far in 2020, we have committed over $1B in new investments in operations safety measures, ranging from technology investments in safety to masks, gloves, and the enhanced cleaning and sanitization required to protect employees from the spread of COVID-19,” spokesperson Rachael Lighty said.

After Reveal’s article was published, Amazon denied misleading the public about its injury rates. “We strongly refute the claims that we’ve misled anyone,” Lisa Levandowski, an Amazon spokesperson, wrote in an emailed statement. She also said Reveal mischaracterized the safety metric, and that the documents the news organization obtained demonstrated that “we have a deep focus on the safety of our teams.”