In a Channel 4 News exclusive, the Russian Ambassador to the UK Andrei Kelin told Cathy Newman a Royal Navy destroyer had gone 3 kilometres into Russian territorial waters, violating a 1980s agreement on the prevention of incidents at sea.
It came after Russia reported a patrol boat had fired warning shots and a jet had dropped bombs in its path, which the Ministry of Defence in London has denied.
Report by Buseld.
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