Six people were either shot or stabbed — one of them fatally — in a sudden spasm of violence across the District on Saturday, authorities said.

Police said the incidents were unrelated, their causes ranging from robberies to domestic squabbles and their locations spanning Southeast to Northwest. Detectives have made an arrest in only one of the cases.

Perhaps the most significant incident occurred just after 12:40 a.m. in the 5300 block of Georgia Avenue NW. Officer Hugh Carew, a D.C. police spokesman, said officers on routine patrol found a man with stab wounds lying on the ground. He was transported to a nearby hospital, where he was later pronounced dead, Carew said.

Carew said detectives do not yet know who killed the man or why. He declined to immediately identify the man, saying his family members had yet to be notified of the incident.

The slaying kicked off what would turn out to be a violent several hours in D.C. Minutes after it, officers were sent to investigate a robbery in the 400 block of 55th Street NE, where a teenager reported that he had been shot and his shoes and shirt stolen, Carew said. Carew said the teen’s injuries are not thought to be life-threatening, and detectives are still searching for a suspect in the case.

Less than two hours later, D.C. police responded to another robbery and shooting — this one at 2:20 a.m. near 5th Street NW and Kennedy Street NW, Carew said. He said three males approached a man and took cash, and one in the group shot him. His injuries, too, were not thought to be life-threatening, and detectives are searching for the suspects, Carew said.

Carew said another man was shot just before 4 a.m. near 22nd Street SE and Hartford Street SE, but he is also expected to survive. Detectives do not have a suspect or motive in the case, Carew said. And a man was stabbed and wounded about 8:30 a.m. on Halley Place SE in what detectives believe was a domestic incident, spurred by a “verbal argument that escalated,” Carew said.

In that case, Carew said, police have arrested and charged 34-year-old Kayonna Mclaughlin with assault with a dangerous weapon. The man she is accused of stabbing, Carew said, was treated and released from a hospital.

About 1:20 p.m., another shooting victim walked into a local hospital, saying he had been shot in the 1700 block of U Street SE. Carew said the man remained conscious, and investigators are working to determine exactly where he might have been shot, and why.