A nail salon worker has been slashed with a knife while trying to break up a pair of brawling teenage shoppers, police allege.

The fight took place at Warringah Mall in Sydney’s Northern Beaches on Monday afternoon.

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Tracy Lam, 42, was treated by paramedics at the scene for a knife wound to her arm before being taken to hospital.

Tracy Lam was allegedly stabbed in the arm (pictured) while trying to break up two fighting teenagers
Tracy Lam was allegedly stabbed in the arm (pictured) while trying to break up two fighting teenagers

Ms Lam claims she was breaking up a fight between the two girls, aged 13 and 14, inside a shop at the mall.

When she approached them, one turned on her and allegedly slashed her with a concealed knife.

Emergency services were called to the shopping centre at 3pm, where police spoke to the 14-year-old girl, who was unhurt, and paramedics treated the victim.

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Ms Lam’s husband and salon owner, Hai, 45, told Daily Telegraph that his wife is still in shock from the horrific incident and doctors are not sure if she would make a full recovery due to possible nerve damage.

‘She was trying to do the right thing,’ Mr Lam said.

She was trying to protect her customers.

The alleged incident took place at Warringah Mall in Sydney's Northern Beaches (pictured) on Monday
The alleged incident took place at Warringah Mall in Sydney’s Northern Beaches (pictured) on Monday

The 13-year-old had allegedly fled the scene but later turned herself in to police.

She was charged with reckless wounding, affray and custody of knife in a public.

The teen from Narraweena, also in Sydney’s north, was granted bail to appear at a children’s court on January 22.

Ms Lam was taken to Royal North Shore Hospital (pictured) to recover from her knife wound
Ms Lam was taken to Royal North Shore Hospital (pictured) to recover from her knife wound

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