Blue Origin’s New Glenn rocket unleashed a massive fireball into the sky as it exploded during a test on May 28, in the latest blow to billionaire Jeff Bezos’s space ambitions.

Blue Origin founder and billionaire Jeff Bezos said it was a ”very rough day” for the company, but it was too early to know the “root cause” of the incident.

Blue Origin’s New Glenn rocket exploded on a Florida launch pad on Thursday, May 29, as it was preparing for its fourth launch next week.

A Blue Origin rocket has exploded during a test at the launch pad

Jeff Bezos's Blue Origin said a rocket exploded during an engine-firing test. No one was hurt, according to officials at Cape Canaveral.