A Syrian child being treated at a small hospital after a suspected toxic gas attack in Khan Sheikhun, a rebel-held town in Syria's north-western Idlib province, as international outrage mounted over the loss of civilian lives. Syrian warplanes have been accused of carrying out the apparent attack on Tuesday with what is believed to be sarin nerve gas, killing dozens of people, including 20 children. But the Syrian army and Russia have denied the claims, and pinned the killings on "armed terrorist groups".
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