Hackers posted confidential documents regarding Covid-19 medicines and vaccines on the internet after a data breach late last year at the European Medicines Agency.

Timelines related to evaluating and approving Covid medicines and vaccines haven't been affected, the EMA said in a statement on Tuesday. The agency said it remains fully functional and that law enforcement authorities are taking action on the breach.

Caught up in the hack were some documents submitted by Pfizer Inc. and BioNTech SE during regulatory review of their vaccine, approved last month. The EMA said it would notify any additional entities and individuals whose documents and personal data may have been subject to unauthorized access.

Pfizer shares fell 2.2% in New York, with BioNTech's American depositary receipts down 5.1%.

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