Pistorius sent bouquet of flowers to the Steenkamp family last Monday, ahead of Reeva's funeral. A handwritten note was attached, a spokesperson has said.
They added that details of any other contact between Oscar Pistorius and Reeva's family are private.
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The announcement was hailed as a "momentous step" that will help families facing financial stress as they come to terms with their loss.
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The decision was met with outrage and anger by UK cities which were on the shortlist for the prestigious award.