DALLAS - Police have hurriedly blocked off streets surrounding department headquarters after receiving a "credible" threat.

Authorities aren't releasing details but rapidly established a perimeter of several blocks around the department.

Return for updates.

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Cooling towers for Units 4 and 3 are seen at Plant Vogtle, operated by Georgia Power Co., in east Georgia's Burke County near Waynesboro, on Wednesday, May 29, 2024. (Arvin Temkar/AJC)

Credit: Arvin Temkar/AJC