"Don't do it! Turkey is working hard to stop this carnage", Trump wrote, before deleting the message and issuing a corrected version of the tweet.
"It's a tragic situation for civilians remaining in the city since Russian jets are hitting any convoy that leaves the city, while those who were able to reach areas closer to the border have nowhere to shelter", said Mohamad Rasheed, an activist in the area.
Syrian government forces have launched a fresh assault on Idlib in recent days to capture the rebel-held province with Russia's help.
Responding to the latest developments in the 8.5-year-old Syrian war, Turkish President Recep Tayyip Erdogan said his country, which now hosts 3.7 million Syrian refugees, could not handle a fresh wave of migrants on its own.
More than 235,000 people have fled from their homes in Syria's rebel-held Idlib province, the United Nations says, as government forces step up their offensive on the area.
After a Turkish Cabinet meeting on December 24, presidential spokesman İbrahim Kalın said Turkey expects a halt to these attacks as soon as possible through a new cease-fire.
'We are now waiting for [Russia] to begin efforts in the coming 24 hours for an end to the regime attacks in Idlib'.
England vice-captain Stokes' father in critical condition
Philander is all set to retire from worldwide cricket after the upcoming Test series against England starting December 26. South Africa were humiliated during their previous series as they lost 3-0 away from home against India.
A ceasefire negotiated by Russian Federation, whose military campaign in support of Mr Assad has turned the tide of the eight-year civil war in his favour, and Turkey, which backs the opposition, halted a government assault on Idlib in August.
It is the first major bout of fighting since the leaders of Turkey, Russia and Iran agreed in Ankara in September to "de-escalate" the conflict in Idlib after a months-long campaign that forced at least 500,000 civilians to flee.
A reported escalation in strikes in the Idlib Province carried out by Russian and Syrian forces in December alone has killed dozens of innocent civilians and displaced tens of thousands of people, many of whom reportedly have sought safety in Turkey.
'Children are bearing the brunt of intensifying violence in northwest Syria, ' the United Nations children's organization UNICEF said Tuesday.
The war in Syria, now approaching its ninth year, has devastated much of the country.
Regime forces are now less than two miles from the strategic city of Maaret al-Numa, war monitors say.
Idlib, in northwestern Syria, hosts some three million people, including many displaced by years of violence in other parts of the country. Several months later he announced he would withdraw US troops from northeastern Syria. On Sunday, Erdogan said more than 80,000 were heading to Turkey. POTUS also claimed that the revenues from the oil would go to fund the Kurdish Syrian Democratic Forces and their militia.