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Four days of intense airstrikes by the Syrian government have reportedly killed more than 200 civilians.
Syrian President Bashar al-Assad's assault on the rebel-held region of Eastern Ghouta has continued despite international pleas for a ceasefire.
This week has marked one of the bloodiest of the entire Syrian conflict. Hospitals say 230 civilians died between February 4 and February 9 in intensified airstrikes by Russian-backed Syrian government forces.
More than a quarter of those killed were children.
Eastern Ghouta's hospitals are overwhelmed with the injured, with many patients in desperate need of evacuation to somewhere with better facilities.
Despite appeals from the United Nations, Mr Assad and his Russian allies haven't allowed the evacuations.
Eastern Ghouta is meant to be a 'de-escalation zone' according to a peace agreement struck by Russia, Turkey and Iran last May.
Approximately 350,000 people are believed to be trapped in the area.