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(Warning: This video may be disturbing to some viewers.)

A Chicago man was gunned down on the street in broad daylight – and disturbingly, it may have all happened on a Facebook live-stream, police say.

Reports say Brian “Sugar Ray” Fields was recording himself on Facebook while he stood outside a closed storefront.

That was when a gunman suddenly walked up and fired 16 shots – five of which struck Fields.

The video then shows the phone being dropped as the shooter briefly steps into the frame. He then fled the scene.

As of Saturday, the victim was in critical condition in hospital, Fox 32 reported.

Police believe Fields, a 31-year-old convicted murderer and known gang member, was targeted – and may have been taunting his rivals.

And while this isn’t the first instance of graphic social media posts raising questions – it may have been the first time someone was shot while live-streaming on Facebook, reports say.

“We are confident (it) isn't a hoax,” Anthony Guglielmi, a police spokesman, said in a statement.

Police are now searching the video for clues and asking anyone with information to come forward.

See more, via Fox 32.

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