IT systems have been disrupted by cyberattacks at Oiltankingin Germany, SEA-Invest in Belgium and Evos in the Netherlands. Dozens of terminals with oil storage and transport around the world have been affected, with firms reporting that the attacks occurred over the weekend. All three companies' IT systems went down or were severely disrupted.It is possible the incidents are unrelated. It may simply be the result of malicious attachments or links propagating via email, meaning companies with shared contacts can sometimes be hit close together. Another possible explanation could be that all the companies use the same software for operations that may have been compromised by attackers.