BALTIMORE (WJZ)—Authorities in Charles County say they are investigating  a threat made against residents in La Plata, Maryland.

Police are working to confirm the credibility of a threat posted on Twitter Wednesday afternoon.

The tweet reads, “IM NOT GONNA STAND FOR THIS NO. MORE. TONIGHT WE PURGE! KILL ALL THE WHITE PPL IN THE TOWN OF LAPLATA #BlackLivesMatter.”

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The tweet appears to have been posted by an account with the handel @_TRVPCOCAINE

Police say multiple agencies are investigating the threat.