NASA astronaut remains at hospital after returning from an extended stay in space.

A NASA astronaut was taken to the hospital for an undisclosed medical issue after returning from a nearly eight-month space station stay extended by Boeing's capsule trouble and Hurricane Milton, the space agency said Friday.

A SpaceX capsule carrying three Americans and one Russian parachuted before dawn into the Gulf of Mexico just off the Florida coast after undocking from the International Space Station mid-week. The capsule was hoisted onto the recovery ship where the four astronauts had routine medical checks.

Soon after splashdown, a NASA astronaut had a “medical issue" and the crew was flown to a hospital in Pensacola, Florida, for additional evaluation “out of an abundance of caution” the space agency said in a statement.

The astronaut, who was not identified, was in stable condition and remained at the hospital as a "precautionary measure,” NASA said.

The space agency said it would not share details about the astronaut's condition, citing patient privacy.

The other three astronauts were discharged and returned to NASA's Johnson Space Center in Houston.

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