SpaceX's Starlink satellite internet service experienced a rare and widespread outage on Thursday, leaving tens of thousands of users offline across the US and Europe.

The disruption began around 3 p.m. EDT and was attributed to a failure in Starlink's core internal software services. The issue affected one of the most resilient satellite systems globally, sparking speculation over whether a botched update or a cyberattack may have been responsible.

Starlink, which serves more than six million users across 140 countries, saw service gradually return after two and a half hours.

Executives from SpaceX, including CEO Elon Musk and Vice President of Starlink Engineering Michael Nicolls, apologised publicly and promised to address the root cause to avoid further interruptions. Experts described it as Starlink's most extended and severe outage since becoming a major provider.

As SpaceX continues upgrading the network to support greater speed and bandwidth, some experts warned that such technical failures may become more visible. Starlink has rapidly expanded with over 8,000 satellites in orbit and new services like direct-to-cell text messaging in partnership with T-Mobile.

Questions remain over whether Thursday's failure affected military services like Starshield, which supports high-value US defence contracts.