A woman appears to have been mauled to death after she reportedly went to feed pet dogs belonging to her daughter.
"She had sustained a number of injuries. An investigation is under way to establish a cause of death," a Scotland Yard spokeswoman said.
A post-mortem examination will be carried out on Thursday.
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Three people have been arrested and charged in connection with violence between West Ham and Chelsea fans at the former Olympic stadium.
This year's poppy appeal is giving special emphasis to the plight of younger service veterans.
West Ham fans clashed with Chelsea supporters on Wednesday during an EFL Cup tie, a game which the Hammers won 2-1.