The UShas said it has identified “potential preparations” for another chemical attack in Syria, and issued a stark warning to the Syrian government.
The White House said the activities were similar to those made before a suspected chemical attack in April.
“The US has identified potential preparations for another chemical weapons attack by the Assad regime that would likely result in the mass murder of civilians, including innocent children,” Sean Spicer, White House press secretary, said in a statement.
Dozens died in the attack which prompted President Trump to order a strike against a Syrian air base.
The US statement warned President Bashar Al-Assad of “a heavy price” if another strike occurred.
“As we have previously stated, the US is in Syria to eliminate the Islamic State of Iraq and Syria [Isis],” Mr Spicer added. “If, however, Mr Assad conducts another mass murder attack using chemical weapons, he and his military will pay a heavy price.”
The US Ambassador to the United Nations, Nikki Haley, said Russia and Iran – Mr Assad’s key allies – would also be responsible if such an attack took place.
The Syrian government has not responded to the US statements.