TEHRAN - At least 57 people have been killed in anti-government protests across Iran that were triggered by the death of a 22-year-old woman who died after being taken into police custody for allegedly improperly wearing a head scarf, or hijab, a rights group says.

The Iran Human Rights Organization said on September 25 that due to the government's blocking of the Internet in Iran, it is difficult to confirm a significant number of reports received over the deaths of protesters. The official death toll stands at 41.

Anti-government protests have rocked the country for 10 nights night since the death of Mahsa Amini. Officials have said she died of a heart attack, but her relatives and some rights groups have rejected that assertion saying she was in perfect health and that they believe she was beaten while being detained.

Some social media reports have quoted members of the families of those killed in the protest as saying officials have listed false causes of death on death certificates, including various diseases. Some say they have been pressured to bury their loved ones at night to hide what happened.

The WhatsApp, Instagram, and Skype messaging applications have been blocked and Internet access in Iran restricted beyond normal levels, according to web monitor NetBlocks. Facebook, Twitter, TikTok, and Telegram were banned well before the most-recent wave of protests.

Nonetheless, videos of protests in Iran continue to be published, and in some of them, security and anti-riot forces are seen shooting directly at crowds.