The Kremlin dismissed US President Donald Trump's warning to Syria not to launch an offensive in the rebel-held enclave of Idlib, saying on Tuesday the area was a "nest of terrorists".
Trump on Monday warned Syria against launching an attack on the country's last rebel stronghold with the help of Russia and Iran, saying the offensive could trigger a "human tragedy."
"President Bashar al-Assad of Syria must not recklessly attack Idlib Province. The Russians and Iranians would be making a grave humanitarian mistake to take part in this potential human tragedy," Trump tweeted.
"Hundreds of thousands of people could be killed. Don't let that happen!"
"Just to speak out with some warnings, without taking into account the very dangerous, negative potential for the whole situation in Syria, is probably not a full, comprehensive approach," Kremlin spokesman Dmitry Peskov said.
The presence of militants in Idlib was undermining the Syrian peace process and making the region a base for attacks on Russian forces in Syria, Peskov added.
The situation around Idlib will be one of the main items on the agenda when the leaders of Russia, Iran and Turkey meet in Tehran this week, Peskov told reporters on a conference call.
(With inputs from agencies)