A highly anticipated decision by the US Securities and Exchange Commission on whether to approve a spot-Bitcoin exchange-traded fund quickly morphed into a major cybersecurity incident on Tuesday.

The SEC’s X account was compromised and a fake post claiming that the agency had green lit plans for the products fueled a brief surge in the price of the world’s biggest cryptocurrency. It also has sparked an investigation by US authorities into how a social media account at Wall Street’s main regulator was compromised.