Update 3.08pm: The death toll from attacks on two security locations in the central Syrian city of Homs has risen to at least 30 people.
More than 60 people have been killed in at least two attacks near a Syrian town just captured by Turkish forces and Syrian opposition fighters from Islamic State militants, Turkey's news agency said.
Nations urging the UN to sanction Syria over chemical weapons attacks are aiming towards a vote shortly, it has been announced.
Iraq's air force has struck Islamic State targets inside Syria for the first time as Iraqi troops on the ground pushed into western Mosul.
Syrian peace talks being sponsored by the United Nations have resumed in Geneva, 10 months after they fell apart over escalating bloodshed in the war-torn country.
Syrian authorities have killed at least 13,000 people since the start of the 2011 uprising, in mass hangings at a prison north of Damascus known to detainees as "the slaughterhouse", Amnesty International has said.
Peace talks in Kazakhstan between the Syrian government and rebel factions have concluded with Russia, Turkey and Iran striking a deal on a three-way mechanism to consolidate a ceasefire in the country.
A Syrian government envoy has denounced a speech by a rebel leader as "provocative" and "insolent" at peace talks in Kazakhstan.
Islamic State militants launched a new attack on the besieged city of Deir el-Zour today - in the most fierce fighting in a year, the Syrian government and opposition activists said.
Syrian President Bashar Assad is prepared "to negotiate everything" at talks set to begin in Kazakhstan, as he seeks to cast himself as a peacemaker after his forces recaptured Aleppo last month.
The death toll in the car bomb attack on a busy market in a Syrian rebel-held town along the Turkish border today has risen to 43, activists and rescue workers said.
At least 15 people were killed when a car bomb went off in a busy market in a Syrian rebel-held town along the Turkish border, Syria's opposition activists and rescue workers said.
Syrian government and opposition forces fighting over the strategic Barada Valley have agreed a temporary ceasefire, according to a media arm of Hezbollah.
Russia has announced it is withdrawing its aircraft carrier and some other warships from the waters off Syria as the first step in a reduction of its forces in the war-torn Middle East country.
Turkey has warned that repeated ceasefire violations by Syria's government are threatening peace talks scheduled for later this month.
Residents of Damascus are scrambling for clean water after the government attacked rebels holding the city's main source in a nearby valley, leading to an accidental outage that has stretched on for nearly two weeks.
Syrian government forces are pressing an offensive in a valley north west of Damascus as 10 rebel groups suspended talks on planned peace negotiations because of what they described as government violations of a ceasefire deal.
The UN Security Council unanimously adopted a resolution supporting efforts by Russia and Turkey to end the nearly six-year conflict in Syria and jump-start peace negotiations.
Besieged opposition pockets around the Syrian capital of Damascus have seen no reprieve in fighting despite a nationwide ceasefire agreement which went into effect more than 36 hours ago, activists said.
Vladimir Putin has announced it will begin at midnight on Friday.