A Detroit man has been arrested after a threatening post he made about police to Facebook, Fox 2 Detroit reports.

The man posted to Facebook calling the person responsible for the Dallas shootings, which resulted in the deaths of five police officers, a "hero".

The post read:

"Definitely a Black Hero. #Dallas Shooter Micah Johnson. Rest in Peace."

Detroit Police Chief James Craig said,

"These individuals that are on social media making threats regarding the suspect -- this violent terror suspect, that's what he is --a hero, that's a problem.The threat on white officers -- because that's the specific threat -- is a threat on all officers."

Police are also searching for another suspect for making threatening posts against police on social media.