Iranian state media says another hearing has begun in the trial of Jason Rezaian, a Washington Post reporter detained more than a year ago and charged with espionage in a case condemned by his newspaper and press freedom groups.

The official IRNA news agency says a fourth closed-door hearing began Monday, without providing further details.

Rezaian's lawyer, Leila Ahsan, said Saturday that this hearing would likely be the last, and would be given over to the defense.

It is not clear when the court will issue its verdict. Rezaian faces 10 to 20 years in jail if convicted, but can appeal.

Rezaian, his wife, Yeganeh Salehi, and two photojournalists were detained on July 22, 2014, in Tehran. All were later released except Rezaian, who has Iranian-American nationality.