Elon Musk’s SpaceX suffered an anomaly in one of its Crew Dragon capsules while conducting engine tests at the Cape Canaveral Air Force Station in Florida on Saturday.

“The initial tests completed successfully but the final test resulted in an anomaly on the test stand,” the company said in a statement.

According to Florida Today, orange smoke was seen rising above SpaceX’s facilities, and that the anomaly was contained with no injuries.

SpaceX said its teams are investigating and are working closely with U.S. National Aeronautics and Space Administration (NASA) partners.

SpaceX's Crew Dragon, is designed to take humans to the International Space Station and successfully flew for the first time in March. It is unknown which Crew Dragon was involved in the Saturday anomaly.

NASA has awarded SpaceX and Boeing Co a total of $6.8 billion to build competing rocket and capsule systems to launch astronauts into orbit from American soil.