CNN) -- Police in New Jersey have made an arrest in connection with a public address system announcement at a Wal-Mart store telling "all blacks" to leave. More details are expected to be announced later Saturday.

Gloucester County prosecutors say that shortly before 5 p.m. on March 14, an unidentified male accessed the public address system at the Turnersville, New Jersey, Wal-Mart Supercenter Store. "All blacks need to leave the store," the voice announced. Store management contacted the Washington Township Police Department, which opened an investigation in conjunction with the county prosecutor's office, according to Deputy Police Chief John Dalesandro.