An international search to find the source of a Salmonella outbreak that has so far been linked to three deaths is under way.
Public Health England says all 156 cases it is investigating are linked - and are likely to have come from a single source.
ITV News correspondent Rupert Evelyn reports:
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Fast-melting Arctic sea ice has forced some 35,000 Pacific walruses to retreat to the Alaska shoreline.
One of the most notorious Mexican drug lords still at large has been captured by soldiers at a seafood restaurant in a picturesque town.
A dossier of online abuse directed at the parents of Madeleine McCann is being examined by police.