Police in DeKalb County, Georgia are investigating a series of random attacks that left a 40-year-old runner dead after being stabbed and shot, according to law enforcement officials.

The victim was described by police as an avid runner who was targeted in what authorities characterize as unprovoked, random violence. The attacks occurred in DeKalb County, though specific locations and timing have not been detailed by police.

Authorities have identified a suspect in the case, described as a repeat offender with a criminal history. The Department of Homeland Security confirmed that the suspect is a naturalized U.S. citizen originally from the United Kingdom.

The investigation has revealed connections to additional incidents, including the killing of a Department of Homeland Security employee, though police have not released details about the relationship between these cases or whether they are part of the same string of attacks.

Police have not released the identities of the victims or the suspect, and the investigation remains ongoing. Authorities have not provided information about a possible motive or what led to the random nature of the attacks.