A woman in her 30s was beaten up by a thug in Balham Hill on Sunday, police say.
She was left with serious facial injuries after being attacked by a man at 3.30pm.
A man was later arrested and bailed pending further enquiries.
Police are appealing for witnesses to call DC James Vinnicombe on 020 8247 5412 Crimestoppers on 0800555111 to remain anonymous.
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