Nasa is reported to be investigating a claim that an astronaut accessed the bank account of her estranged spouse from the International Space Station, in what may be the first allegation of a crime committed in space.  

According to a report by New York Times, astronaut Anne McClain acknowledges accessing the account from the ISS but denies any wrongdoing.

Her estranged spouse, Summer Worden, reportedly filed a complaint with the Federal Trade Commission.

The astronaut told the New York Times through a lawyer that she was merely making sure that the family's finances were in order and there was enough money to pay bills and care for Ms Worden's son - who they had been raising together prior to the split.

"She strenuously denies that she did anything improper," said her lawyer, Rusty Hardin, adding that Ms McClain was "totally co-operating".

Ms McClain and Ms Worden, who is an Air Force intelligence officer, married in 2014 and Ms Worden filed for divorce in 2018.

Investigators from Nasa's Office of Inspector General have contacted both over the allegation.