Police are looking for a man who may have witnessed the stabbing of a pensioner in Tulse Hill.
The 67-year-old was stabbed in the arm by a knifeman in Greenleaf Close on Saturday, March 20.
The victim said he saw another man at the scene who warned the pensioner his attacker had a knife.
Police believe the man who gave the warning could be a significant witness and could help identify the knifeman.
Police want to speak to him, or anyone else who may have seen the attack or heard anything about it.
Anyone with information please call Lambeth police on 020 8649 2117 or Crimestoppers anonymously on 0800 555111.
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