A Fort Worth police officer has been placed on restricted duty after an ominous social-media post urging African Americans to arm themselves.

According to WFAA-TV (ABC 8), a Fort Worth Police spokesman confirmed the department is looking into a Facebook post encouraging African Americans to "fortify yourselves in every way possible, purchase many guns and rounds of ammunition... and be ready."

The author added: "I have been watching a few coworkers whom (sic) were definitely suspect, looking at them now all my suspicions are confirmed.... You may have to answer the call for revolution sooner than you think."

The remarks have since been removed. Investigators are trying to figure out whether they were posted by the officer or if the account may have been hacked. In the meantime, the officer, who has not been named, cannot wear a badge or carry a gun.