New York (CNN Business) Thick plumes of smoke rose over a SpaceX facility in Florida during a test fire of a Crew Dragon spacecraft on Saturday. If the issue was serious, it could derail plans to fly astronauts aboard the capsule later this year.

SpaceX said the craft was undergoing a "series of engine tests" at a facility in Cape Canaveral, and something went wrong during the final stretch. SpaceX will work with NASA to determine what caused the issue. No injuries were reported.

"Ensuring that our systems meet rigorous safety standards and detecting [issues] like this prior to flight are the main reasons why we test," SpaceX said in a statement.

Crew Dragon is already overdue, and more delays could make things tricky for NASA. The United States has not had the technology to fly humans to orbit since the space shuttle program ended in 2011. Meanwhile, NASA has paid Russia about $80 million per seat to send astronauts to the International Space Station aboard Soyuz capsules — a fact that isn't very popular in the halls of Congress.

NASA decided to ask the private sector to design and build a new generation of spacecrafts.

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