Hanan Ashrawi, who was close to Yasser Arafat and saw him shortly before he left for Paris has said that his illness looked "unnatural."
She said: "I talked to the medical teams that were examining him, they told me that unquestionably that he was poisoned, but they couldn't identify the poison."
Ms Ashrawi said that "we have to pursue now the people that are responsible justice has to be done."
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Expect cloudy conditions with some light rain on Saturday morning before brighter spells develop later in the southeast.
Over 100 people are missing and feared to have been buried under debris following a landslide in China.
Members of the London community have rallied round to offer their help to residents of the evacuated Chalcots estate in Camden.