NASA weighs cutting short International Space Station mission due to astronaut medical issue

NASA is considering an early return of its crew aboard the International Space Station (ISS) due to an unspecific medical issue. 

The rare move comes after the agency canceled a spacewalk initially scheduled for Thursday, according to Reuters. 

"Safely conducting our missions is our highest priority, and we are actively evaluating all options, including the possibility of an earlier end to Crew-11's mission," a NASA spokesperson said in a statement on Wednesday night, NBC News reports.