US President Donald Trump spoke with Turkish President Recep Tayyip Erdogan on Saturday and "expressed concern over the violence in Idlib, Syria," the White House said in a statement on Sunday.

"President Trump conveyed the United States’ desire to see an end to Russia’s support for the Assad regime’s atrocities and for a political resolution to the Syrian conflict. President Trump also reiterated that continued foreign interference in Libya would only serve to worsen the situation.”