The statement continued: “Our teams are continuing to work around the clock to resolve this disruption and we will update you as soon as we have more information.
“An investigation into the incident is ongoing and we are working with external experts. We have reported the incident to our regulators and the relevant security authorities.”
Royal Mail first announced the attack last Thursday, January 12.
It’s said that more than half a million parcels and letters are stuck in limbo after machines used for printing customs dockets were disabled.
The attackers are thought to have used ransomware, which is a type of malicious software designed to block access to computer files or a system until a sum of money is paid.
Reports state the software also took over printers at Royal Mail’s international sorting offices and caused ransom notes saying “your data are stolen and encrypted” to “spout” from the machines.
Royal Mail is yet to confirm when shipping will resume following the severe service disruption.
Royal Mail has been hit by a high level of disruption over the past few months, with workers staging a number of strikes following unsolved disputes over jobs, pay and conditions.
