Police officers stand outside Boots pharmacy, near to the Barcroft Medical Centre in Amesbury, Wiltshire, where a major incident has been declared after it was suspected that two people might have been exposed to an unknown substance. PRESS ASSOCIATION Photo. Picture date: Wednesday July 4, 2018. Police say that the man and woman, both in their 40s, are in a critical condition at Salisbury District Hospital. See PA story POLICE Amesbury. Photo credit should read: Yui Mok/PA Wire
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