According to The New York Times, 60 million doses were unusable.
Another 10 million doses from the plant will be allowed to be distributed but with a warning that the FDA cannot guarantee they were produced using good manufacturing practices, according to the Times.
In a statement, the FDA confirmed that it has now authorized two batches of the vaccine.
Federal officials "determined several other batches are not suitable for use, but additional batches are still under review and the agency will keep the public informed as those reviews are completed," the agency said.
The agency referred questions about specific numbers to Johnson & Johnson, which did not respond.