WASHINGTON-The Syrian regime has built a crematorium 45 minutes outside of Damascus where the us government believes they are burning the bodies of the thousands of prisoners executed inside the walls of the Saydnaya military prison, an institution nicknamed "the slaughterhouse". As many as 50 detainees per day are killed at the center, Jones said, citing "multiple sources", with many disposed of in mass graves.
"Today we are releasing newly declassified reporting and photos that underscore the depths to which the Syrian regime has gone with the continued support of its allies with Russian Federation and Iran", Jones told reporters.
The State Department believes the building is a crematorium because of the presence of a "discharge stack, the probable firewall, and probable air intake - this is in the construction phase - this would be consistent if they were building a crematorium".
The latest satellite photograph presented by Mr Jones was from January 2015, and it was not immediately clear why the United States waited to present its evidence.
The announcement was made by Stuart Jones, acting assistant secretary for the State Department Bureau of Near Eastern Affairs, in Washington on Monday who gave reporters satellite pictures showing the alleged facility.
Jones said the regime has also authorized the extra judicial killings of thousands of detainees at Saydnaya, which is a 45-minute drive outside of Damascus.
Jones said the information proves that the regime of Syrian President Bashar al-Assad continues to violate worldwide law, intentionally targeting and killing innocent civilians.
And he said he hoped to work with Putin, whose forces are in Syria to protect Assad's regime, in this goal.
'Saydnaya Military Prison is where the Syrian state quietly slaughters its own people, ' the report said.
The allegation could test the Trump administration's willingness to respond to atrocities, other than chemical weapons attacks, that it blames on President Bashar Assad's government.
"These atrocities have been carried out seemingly with unconditional support from Russian Federation and Iran", he said.
Jones continued, "The building of crematorium is an effort to cover up an extent of mass murders in Sednaya prison".
Asked whether the U.S.is considering a new attack to destroy the crematorium, Jones said that as Trump has said, the U.S.is "not going to signal what we are going to do and what we're not going to do".
According to Amnesty's report in February, which was based on the testimony of witnesses, it was estimated that between 5000 and 13,000 people were executed at Saydnaya over five years.
Monday, Jones said Syria's actions have been carried out with "unconditional" support from allies Russian Federation and Iran.
The official said 400,000 people, mostly civilians, had died in the Syrian civil war so far.
Meanwhile, the United Nations envoy for Syria insisted that the latest round of peace talks between the government and the opposition in Geneva are serious, after president Bashar Al Assad said last week that they were just for show.