The chief executive of CrowdStrike, the firm at the centre of the global IT outage, has said he is "deeply sorry" for the incident, and warned it will take "some time" for systems to be fully restored.George Kurtz said a fix had been deployed for a bug in an update rolled out by the cybersecurity firm which affected Microsoft Windows PCs, knocking many offline around the world, causing flight and train cancellations and crippling some healthcare systems.

The chief executive of CrowdStrike, the firm at the centre of the global IT outage, has said he is "deeply sorry" for the incident, and warned it will take "some time" for systems to be fully restored.George Kurtz said a fix had been deployed for a bug in an update rolled out by the cybersecurity firm which affected Microsoft Windows PCs, knocking many offline around the world, causing flight and train cancellations and crippling some healthcare systems.