Friends, family and others from across Birmingham attended the unveiling of a memorial stone for schoolgirl Christina Edkins.
The 16-year-old was attacked and stabbed to death on the top deck of the number 9 bus, which was travelling on the Hagley Road in March.
The stone has been placed near to where the attack took place, at number 54 Hagley Road.
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The trust which runs Burghley House near Peterborough has been fined £266,000 after a butler was crushed to death in a luggage lift.