A mother was robbed of her £100 mobile phone in front of her young daughter in a late-night attack.
The 25-year-old victim and her six-year-old child were kicked several times as they returned home to Observatory View, Hailsham.
The two men and two women fled on foot with her Nokia 3310 mobile phone while witnesses dashed to her aid at 10.45pm.
Police are urgently trying to trace the person who made a 999 call from a telephone box opposite Bellbanks Road and Market Street.
They would also like to hear from four people who offered the victim assistance after the attack, which left her bruised and shocked.
A man of 41 was arrested and questioned before being released on police bail pending further inquiries.
Anyone with information should contact Sussex Police on 0845 6070999 or Crimestoppers anonymously and free on 0800 555111.
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