This was a shockingly violent attack on a man who was simply attempting to prevent the robbery of his bag.
I would urge anyone who saw what happened, or who has information about those responsible, to make contact with police.
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Police arrived at the 73-year-old's home after Alfie chased a delivery man.
Officers believe the three assaults are linked and are appealing for information about the suspect.
Nine addresses in Lewisham were searched and 13 arrests made early on Tuesday morning in a planned, intelligence-led operation.