NASA said in a statement on Sunday evening that the astronauts' anticipated ocean splashdown will take place off the Florida coast on March 18 (GMT).

NASA astronauts Butch Wilmore and Sunita Williams are set to return to Earth after nine months in space. Four replacement astronauts from the U.S., Japan, and Russia have arrived at the International Space Station.

A pair of US astronauts stuck for more than nine months on the International Space Station will be returned to Earth on Tuesday evening, NASA said.