The United States said on Tuesday it had moved to disrupt an Iranian-Russian network that sent millions of barrels of oil to Syria and hundreds of millions of dollars to indirectly fund militant groups Hamas and Hezbollah.
Iraq launched air strikes on Islamic State targets inside neighbouring Syria on Tuesday, destroying two buildings housing 40 fighters and weapons, its military said.
Hundreds of Islamic State militants withdrew from the heart of a rugged area in southeastern Syria after holding up for over three months against a major campaign by the Syrian army and its allies to crush them, rebels and residents said on Sunday.
The United States' support for the Syrian Kurdish YPG militia is a "big mistake", Turkish Foreign Minister Mevlut Cavusoglu said late on Saturday, adding that the issue had strained ties between the NATO allies.
At least forty people, mostly women and children were killed on Saturday in the latest wave of U.S.-led coalition airstrikes against the last remaining Islamic State-held pocket in Syria near the border with Iraq, the militants and some local residents said.
Syrian rebels said on Saturday the Syrian army and their allies were intensifying attacks on a demilitarised zone in the northwest in an attempt to undermine a Russian-Turkish deal that has averted a major offensive on their last stronghold.
Thousands of Syrians are trapped by battles or face hard choices about returning home even though relative calm has held in the northwest for two months, the United Nations said on Thursday.
The Trump administration hopes that the U.S.-backed fight against Islamic State in its last foothold in northeastern Syria will end within months but American forces will remain to ensure the "enduring defeat" of the militant group, a top U.S. diplomat said on Wednesday.
At an Iranian government-owned car plant near Homs, the small number of vehicles on the assembly line underscores the obstacles hobbling Tehran's economic ambitions in Syria.
A Trump administration envoy on Tuesday urged Syria's ally Russia to push for the release of Austin Tice, an American freelance journalist kidnapped in Syria six years ago.