A Blue Origin rocket engine exploded during testing last month, CNBC has learned, a destructive setback with potential ramifications for the company's customers and its own rocket. A Blue Origin spokesperson, in a statement to CNBC on Tuesday, confirmed the company "ran into an issue while testing Vulcan's Flight Engine 3." "No personnel were injured and we are currently assessing root cause," Blue Origin said, adding "we already have proximate cause and are working on remedial actions." Blue Origin also said it will be able to "continue testing" engines in West Texas. "We will be able to meet our engine delivery commitments this year and stay ahead of our customer's launch needs," Blue Origin added.