The couple in the West of England are critically ill in hospital. The BBC's security correspondent says one theory is that they were contaminated by some of the substance discarded following the attack on Sergei and Yulia Skripal in the city of Salisbury in March, which the British government blamed on Russia. Also: clashes between Israeli police and Palestinians protesting against the planned eviction of Bedouin herders from their village in the occupied West Bank, and the latest attempts to save the Northern White Rhino from extinction using in vitro fertilisation (IVF).
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