BEIRUT – Warplanes launched heavy attacks on the two last major rebel-held areas in Syria, killing at least 29 people in the Ghouta suburb near the capital and choking people with gas in Idlib in the northwest, rescue workers and a war monitor said on Monday.
President Bashar Assad’s government has vowed to retake all of Syria from rebels who have lost large swaths of the territory they have held in a war now entering its eighth year.
A years-long siege on the last major rebel-held area near the capital Damascus, the suburb of eastern Ghouta, has tightened in recent months. In the northwest, the government and its militia allies have been trying to advance in mostly rural Idlib, the last province still largely under rebel control.
The Britain-based Syrian Observatory for Human Rights monitoring group said warplanes attacking eastern Ghouta near Damascus had struck the towns of Zamalka, Arbaeen, Hazza and Beitu Soua, killing at least 29 people. State media said rebel fighters shelling the government-held capital killed a woman.
International concern has been growing over the fate of eastern Ghouta, where residents say they have been running out of food and medicine.
In the northwest, the other main battlefield in the war between Assad’s government and its main rebel opponents, bombing also intensified on Sunday night after rebels shot down a Russian warplane on Saturday.
Rescue workers said at least nine people had suffered breathing problems from chemicals dropped from the air. Aid groups and rescuers said three hospitals had also been struck.
The Syrian American Medical Society (SAMS), a charity that supports hospitals in Syria, said its doctors in Idlib reported 11 patients “with symptoms indicative to usage of chlorine.
Two barrels containing chemical gasses had been dropped from helicopters on Sunday night, Radi Saad, from the chemical weapons team of the White Helmets civil defense group that operates in rebel-held parts of Syria, told Reuters.
The International Committee of the Red Cross (ICRC), the White Helmets and the U.S.-based Union of Medical Care and Relief Organizations (UOSSM) said health care facilities in northwestern Syria had been hit by airstrikes.
“With the majority of hospitals no longer operating in these areas, these latest attacks will deprive tens of thousands of life-saving care,” the ICRC said on Twitter.
The Syrian government has consistently denied using chlorine or other chemical weapons during Syria’s conflict. Rescue workers and medical groups have accused government forces of using chlorine gas against the rebel-held eastern Ghouta at least three times over the last month, most recently on Thursday.
Syria agreed to give up its chemical weapons arsenal in 2013. In the past two years, a joint inquiry by the United Nations and the Organization for the Prohibition of Chemical Weapons (OPCW) has found the Syrian government used the nerve agent sarin and has also several times used chlorine as a weapon. The inquiry also said the Islamic State group has used sulfur mustard.
The German government called on Monday for a thorough investigation into reports Syria had used chemical weapons in both Idlib and eastern Ghouta.
“If it is confirmed that the Syrian government has once again used chemical weapons, that would be an abhorrent act and an egregious violation of the moral and legal obligation to avoid the use of chemical weapons,” a German foreign ministry official said.
U.S. Defense Secretary Jim Mattis said last week that the Syrian government had repeatedly used chlorine as a weapon, and Washington was also concerned about the potential use of sarin.
The Syrian civil war has killed hundreds of thousands of people and driven more than 11 million from their homes. Neighbors and global powers have been drawn into the multisided conflict, sponsoring allied groups on the ground.
Turkish forces are in northwest Syria, entering Idlib under a “de-escalation” agreement reached with Assad’s backers Russia and Iran. They also expanded their operation two weeks ago into the nearby Afrin region to fight against Kurdish militias who hold that territory.
The Turkish army said on Monday its forces had set up a military post southwest of the Syrian city of Aleppo, the deepest position they have established so far inside northwest Syria under their deal with Russia and Iran.
The “de-escalation” in violence they were supposed to monitor has collapsed. In December, the Syrian army alongside Iran-backed militias and heavy Russian air power launched a major offensive to take territory in Idlib province.
The Observatory said the new Turkish observation post was near the village of al-Eis. That would place it less than 5 km (3 miles) from territory held by Syrian government forces and their allies, and deeper inside Syria than the three observation posts set up by the Turkish army so far.
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