FLICKR, PHILLIP WONGSpringer and BioMed Central today (November 1) announced the retraction of 58 articles across seven journals, affecting more than 200 authors. Springer Nature, the company behind both subsidiary publishers, issued the mass retraction notice upon discovering that some of the now-pulled papers’ authors had manipulated the peer review process, and that some of the reports contained plagiarism.

“We take every allegation seriously, and investigate every allegation of plagiarism,” a Springer Nature spokesperson told Retraction Watch. “In this case we identified irregularities which led us to suspect a broader pattern of manipulation.”

While most retractions are quiet, single-study affairs, in recent years publishers have issued an increasing number of mass retractions. In 2014, for instance, Springer and IEEE pulled more than 120 papers that had been produced by SciGen, a random study generator.

But the most recent cases of misconduct reported by Springer Nature were more difficult...