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ATLANTA -- Officials with the City of Atlanta have announced an internal investigation into a fatal accident that killed aDepartment of Public Works worker on Saturday morning.

MORE:Authorities identify city worker killed in SW Atlanta wreck

In a statement released on Wednesday afternoon, a spokesperson from the mayor's office said:

"Saturday's fatal car crash involving employees of the Department of Public Works was a horrible tragedy that has deeply affected our workforce. A criminal investigation has determined that alcohol was a factor in the incident. As a result, the Atlanta Police Department is currently seeking arrest warrants against the driver on charges of homicide by vehicle in the first degree, driving under the influence, and failure to maintain lane. The City of Atlanta has a zero tolerance policy for drug and alcohol use and routinely conducts random screenings. An internal investigation is being conducted and we will take appropriate action based on the outcome of that investigation."

The accident happened early Saturday morning after an Atlanta Public Works dump truck lost control on Interstate 75 near Cleveland Avenue. As a result of the crash, 54-year-old Derryl Simmons, a city employee, was killed.

At this time, the driver of the truck is in critical condition at Grady Memorial Hospital.

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