HELENA, Mont. (AP) — A federal jury on Monday said BNSF Railway contributed to the deaths of two people who were exposed to asbestos decades ago when tainted mining material was shipped through a Montana town where thousands have been sickened.

The jury awarded $4 million each in compensatory damages to the estates of the two plaintiffs, who died in 2020. Jurors said asbestos that spilled in the rail yard in the town of Libby, Montana was a substantial factor in the plaintiffs’ illnesses and death.

The jury did not find that BNSF acted intentionally or with indifference so there will be no punitive damages awarded. Warren Buffett’s Berkshire Hathaway Inc. acquired BNSF in 2010, two decades after the vermiculite mine in Libby shut down and stopped shipping its contaminated product by rail.

The pollution in Libby has been cleaned up, largely at public expense. Yet the long timeframe over which asbestos-related diseases develop means people previously exposed are likely to continue getting sick for years to come, health officials say.