The East Anglian Air Ambulance (EAAA) have warned people to not open an e-mail sent from them.
The emergency services organisation were the victims of a cyber attack at 11.01am today which targeted their e-mail system.
They have warned their followers on Twitter to not open an e-mail from them that contains the subject line: “Update message from...”
The EAAA have asked recipients to delete the e-mail immediately.
If you do have any suspicion over an e-mail sent to you by the EAAA then give them a call on 03450 699999.