The Georgia Bureau of Investigation is probing the death of a Stone Mountain man killed Saturday morning during “an altercation” with Gwinnett County police officers.

Gwinnett County police spokesman Sgt. Brian Doan said officers responded to the 5100 block of Rock Place Drive around 4 a.m. Saturday after a 911 caller “stated that there was a male neighbor that was locked in his garage who was irate and possibly armed.”

Officers made contact with the man and “an altercation ensued,” Doan said.

“The suspect went unresponsive at the scene and was transported to Eastside Medical Center where he was pronounced dead,” Doan said. “Due to this being an in-custody death, the GBI has been contacted and will handle the investigation.”

Doan confirmed Saturday morning that no shots were fired. He said he could not yet release the deceased man’s identity.

Gwinnett police did not provide any further information. Reached Saturday morning, a GBI spokeswoman also did not have additional information.

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