Police investigating reports of a disturbance at Tesco Express in Eastbourne are appealing for any witnesses to come forward.
Officers were called after a woman made threats to staff at the store in Seaside Road at about 7pm on Saturday, November 13.
The suspect was asked to leave the store by security and by staff but continued to make threats against them.
After leaving the store, the suspect walked off via Bourne Street.
PC Julia Turner said she wanted to hear from anyone who saw what happened or anyone who recorded mobile phone footage of the incident to come forward.
Shortly afterwards officers arrested a 34-year-old woman from Eastbourne on suspicion of harassment, common assault, and racially aggravated common assault
She was released on police bail until December 5 while the investigation continues.
Anyone with information about the incident is asked to report it to Sussex Police online or call 101 and quote serial 1124 of 13/11.