Hockey player Hannah Macleod has got her Olympic bronze medal back.
Scotland Yard said it been posted anonymously to the England Hockey head office in Buckinghamshire.
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Gerald Grosvenor led the initiative for the Defence National Rehabilitation Centre and gave £70 million of his own money.
The mother-of-two said she was told by RSPCA investigators they were looking at the possibility that poison-laced sausages were involved.
Nizhny Novgorod had a carnival atmosphere on Friday as Panama fans took over the centre.