President Emmanuel Macron of France has said he has “proof” that the Syrian government carried out chemical weapons attack on Douma.
The French leader, however, said on Thursday he would decide “in due course” whether to strike Syria.
“We have proof that last week chemical weapons, at least chlorine, were used by the regime of Bashar al-Assad,” he said in a TV interview.
The West has accused Syria of attacking the town but Russia insists the government of Bashar al-Assad did not do it.
Kremlin spokesman Dmitry Peskov urged against “any steps which could lead to an escalation of tensions”.
In the meantime, US President Donald Trump, who said on Wednesday that missiles were “coming”, on Thursday tweeted that he “never said when.”
It “could be very soon or not so soon at all”, said the president, who has cancelled a planned trip to stay in the US with his defence secretary, and who has been canvassing support for strikes from the leaders of other countries including the UK and France.