Four astronauts are returning to Earth early from the International Space Station due to a medical issue with one of them.

A SpaceX capsule has splashed down back to Earth carrying four astronauts from the International Space Station, after a medical issue prompted them to evacuate and cut their mission a month short.

This was the first time in the 25-year history of astronauts living on the International Space Station that someone had to return to Earth because of a health issue.