Bayer AG agreed to settle cases related to a Seattle-area school where more than 200 people were exposed to toxic chemicals made by the company’s Monsanto unit.

Bayer didn’t disclose the financial terms of the accord, but said the cost was covered by a $618.1 million provision taken this month to deal with the company’s liabilities for polychlorinated biphenyls, or PCBs, once manufactured by Monsanto. The company’s shares rose 2.3% in Germany.

Ex-students and teachers at the Sky Valley School outside Seattle sued Bayer and Monsanto over injuries tied to PCBs contained in aging fluorescent-light fixtures. The deal announced by Bayer — already enmeshed in multiyear litigation over its herbicide Roundup — is seen as a positive development in its handling of a wave of PCB lawsuits over Monsa

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