Cyber-security experts and agencies around the world are warning people about a wave of opportunistic hacking attempts linked to the IT outage.

Although there is no evidence that the CrowdStrike outage was caused by malicious activity, some bad actors are attempting to take advantage.

Cyber agencies in the UK and Australia are warning people to be vigilant to fake emails, calls and websites that pretend to be official.

And CrowdStrike head George Kurtz encouraged users to make sure they were speaking to official representatives from the company before downloading fixes.