via Washington Post:
The Syrian government has constructed and is using a crematorium inside its notorious Sednaya military prison outside Damascus to clandestinely dispose of thousands of prisoners it continues to execute inside the facility.
At least 50 prisoners a day are executed in the prison, some in mass hangings, said Stuart Jones, the acting assistant secretary of state for the Middle East. A recent Amnesty International report called Sednaya a “human slaughterhouse” and said that thousands of Syrians have been abducted, detained and “exterminated” there.
The government of President Bashar al-Assad, Jones said, has carried out these atrocities and others “seemingly with the unconditional support from Russia and Iran,” his main backers.