UN Secretary-General Ban Ki-moon has announced the United Nations will launch an investigation - as requested by the Syrian government- into allegations that chemical weapons were used in Syria.
"I have decided to conduct a United Nations investigation into the possible use of chemical weapons in Syria", Ban told reporters.
He said the investigation will look into "the specific incident brought to my attention by the Syrian government".
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Cloud and outbreaks of rain will ease away eastwards during the morning, clearing the east coast around midday with sunny spells developing.
Police and emergency services are attending the scene.
Rebel-held east remains at risk while the pumping station supplying the western part of the city is once again in operation.