A federal court jury found that Bayer's (BAYRY) - Get Report Roundup herbicide was a factor in causing a California man's cancer, setting the stage for a second phase to determine liability and damages, according to a published report.
The same jury will hear the second phase of the trial, Reuters reported.
Bayer completed its acquisition of Monsanto, which created the widely used Roundup herbicide, last year.
More than 11,000 lawsuits have been filed claiming Roundup caused cancer, but most haven't gone to trial yet.
In a statement, Bayer said it was "disappointed with the jury's initial decisions, but we continue to believe firmly that the science confirms glyphosate-based herbicides do not cause cancer." The company insisted that the finding "has no impact on future cases and trials because each one has its own factual and legal circumstances."