WASHINGTON (Reuters) -Three NASA astronauts and a Russian cosmonaut were taken to a local medical facility "out of an abundance of caution" after splashing down in the Atlantic Ocean near Florida on Friday morning, capping a nearly eight-month mission on the International Space Station, the U.S. space agency said, without providing further details.

NASA astronauts Matthew Dominick, Michael Barratt, and Jeanette Epps, and Russian cosmonaut Alexander Grebenkin "were taken to a local medical facility for additional evaluation," NASA said in a statement following the crew's return from the ISS aboard their Crew Dragon spacecraft.

The crew had their standard medical evaluations upon exiting the craft, NASA said, but added, "out of an abundance of caution, all crew members were flown to the facility together."

NASA, which is usually tight-lipped on astronaut medical issues, declined to say what prompted the abundance of caution or describe the crew's condition.

(Reporting by Joey Roulette; editing by Jonathan Oatis)