The State Department says the crematorium is being used to hide evidence of the extent of the killings.
Syrian President Bashar Assad says experts will see that reports of what happened in the Idlib province “were all lies.”
Senior Israeli defense officials say Syria’s Assad is still believed to possess up to 3 tons of chemical weapons.
The United States and Russia laid bare their deep and dangerous divides on Syria and other matters Wednesday.
Mayor Rahm Emanuel declared his support for President Donald Trump’s missile strike against Syria to retaliate for a deadly chemical weapons attack.
Trump suggested strongly that Assad may have to leave power, and his comments were underscored by Secretary of State Rex Tillerson.
President Donald Trump called a chemical weapons attack in Syria “affront to humanity,” but did not say what the U.S. might do in response.