X suffered widespread outages, with Downdetector reporting a peak of 39,021 affected users in the US by 10:00am ET. By 5:00pm, the number of reported disruptions had fallen to around 1,500.
A source within the internet infrastructure industry, speaking on the condition of anonymity, told _Reuters_ that X was targeted by multiple waves of denial-of-service attacks beginning at 9.45 UTC.
These attacks, which flood websites with rogue traffic, can be disruptive despite not being highly sophisticated.