The Syrian war began in March 2011 when waves of peaceful demonstrations were repressed by the security forces, eventually leading to an all-out conflict involving many sides.
More than 330,000 people have been killed and millions displaced, but HRW says the exact number of those missing could not be determined as most detention facilities were off-limits to outsiders.
"An independent institution in charge of investigating the fate and whereabouts of the disappeared, as well as unidentified human remains and mass graves in Syria, should be created immediately," said HRW.
Last year, a team of UN experts raised the alarm over enforced disappearances and called for the situation to be referred to the International Criminal Court.
"Syria will not be able to move forward if negotiations fail to adequately address the horrors of detention and disappearance," said Sarah Leah Whitson, Middle East director at HRW.
"This should not be ignored. Without progress, each day that passes will likely see more of the disappeared tortured or executed," she said.
Thousands of peace activists were arrested during the first years of the Syrian conflict, and some are still languishing in prisons, according to non-governmental organisations.
Earlier this month, the death of prominent computer scientist Bassel Khartabil Safadi was confirmed two years after his execution by the regime.
Safadi had been arrested in March 2012 in the wake of the crackdown.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
