Police were called to break up an 'aggressive dispute' outside Tesco Express in Worthing town centre.
A spokesman for Sussex Police said that at 10.35am today, police attended a 'public order incident' outside the store in Chapel Road, Worthing.
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An eyewitness saw three police cars parked outside the shop.
The police spokesman said two men and a woman were involved in an 'aggressive dispute', so officers 'intervened to resolve the situation'.