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A stockpile of 1.5 million expired N95 respirator masks belonging to the US Customs and Border Protection agency is expected to be deployed to the Transportation Security Administration to aid its underequipped workforce, a report said.

Officials with the Department of Homeland Security decided to deliver the supply of protective masks to the TSA on a Wednesday conference call, sources told The Washington Post.

The masks have been sitting inside an Indiana warehouse, the report said. While they are past their expiration date, a White House official told the paper that they still function properly.

“The masks are fully capable,” the official said. “We’d never put the lives of the men and women at DHS at risk.”

Expired N95 masks that have been properly stored remain functional, according to new guidance from the US Centers for Disease and Control.

CBP spokesman, Nathan Peeters, acknowledged the supply of masks and told the paper the agency has been “working with our DHS partners to determine the best use for N95 respirators in CBP’s emergency stockpile.”

It’s unclear when the masks will be shipped to the TSA.