WASHINGTON -- Inspectors from an international agency sent to collect air, water and ground samples from the site of a suspected poison gas attack in Syria this month were blocked Monday by Russian and Syrian forces for security reasons, the watchdog group's director said.
The delay in obtaining independent confirmation of suspected chemical weapons use came as the White House postponed plans to add sanctions on Russia for what the Trump administration said was its support of Syrian President Bashar Assad's poison gas program.
Nikki Haley, the U.S. ambassador to the United Nations, had said Sunday that new sanctions would be announced Monday, but the White House pulled back. "We are considering additional sanctions on Russia, and a decision will be made in the near future," White House press secretary Sarah Huckabee Sanders told reporters.
She did not say if Haley had misspoken or if President Donald Trump had changed his mind to avoid worsening relations with Moscow. The Trump administration has taken an increasingly tough line on Russia even as the president has been reluctant to criticize President Vladimir Putin for his government's meddling in the 2016 U.S. election and other actions.
The confusion emerged as nine inspectors from the Organization for the Prohibition of Chemical Weapons waited in Damascus for permission to visit Duma, a suburb east of the Syrian capital that was attacked on April 7.
U.S. officials say Assad's forces killed more than 40 people, including children, with chlorine gas and possibly sarin, a banned nerve agent. But U.S. intelligence has been unable to collect ironclad evidence of which chemical agents were used.
U.S. and British officials have accused Russian units in Duma of trying to hide or tamper with evidence of the chemical attack, a claim Moscow denies.
Stephane Dujarric, spokesman for United Nations Secretary-General Antonio Guterres, said in New York that the OPCW team had all "necessary clearances" to collect samples in Duma.
But Ahmet Uzumcu, director general of the OPCW, which is based in The Hague, said in a report to member states that Syrian and Russian officials had contended "there were still pending security issues to be worked out before any deployment could take place."
Uzumcu expressed hope the inspectors could visit Duma "as soon as possible."