During this period, authorities opened 46 new judicial cases amid a growing crackdown on press freedom.
From January 1 to June 1, suppression of free speech intensified after Masoud Pezeshkian’s election as president, with press freedom indicators hitting unprecedented lows, the group said.
“During this period, the suppression of free information, which had taken on new and complex dimensions since Masoud Pezeshkian’s election as president, expanded significantly," wrote DeFFI.
"Indicators of freedom of expression recorded an unprecedented decline, judicial and security actions against journalists and media outlets increased sharply, and the Islamic Republic escalated cross-border threats against Iranian reporters at an alarming rate."
In the past six months, courts sentenced ten of the journalists collectively to 22 years and three months in prison, the report added.
One of the harshest sentences was given to Iranian-American journalist Reza Valizadeh, imprisoned in Tehran’s Great Prison, and sentenced to 10 years and additional penalties by the Tehran Appeals Court.
The judiciary’s most frequent accusation against journalists was “publishing falsehoods to disturb public opinion.”