Police investigating a shooting of a juvenile and an attack on an off-duty officer in the same block in Southeast Washington on Wednesday night say the two incidents appear to be unrelated.

Authorities released additional details Thursday evening clarifying the circumstances of overlapping crime scenes, including one where a man allegedly pointed an AK-47 assault weapon at an officer. Police stressed that both incidents remained under investigation.

It began in the 300 block of 34th Street SE, when an off-duty officer heard gunshots and encountered a youth who had been shot in the arm in an apparent robbery, police said.

The officer put out a description of a gray Chevrolet Suburban that other officers spotted moments later in the 3900 block of Minnesota Avenue NE. Police chased the vehicle as it sped north, with the occupants throwing two guns out of the windows, until it crashed at Eastern and Kenilworth avenues in Prince George’s County.

Prince George’s County police arrested two of the occupants, and D.C. officers arrested the third after he ran back into the District, police said. Police said they planned to charge the driver with assault with a dangerous weapon; his name has not yet been released.

A short time later, the off-duty officer in the 300 block of 34th Street SE got a complaint of a man with a gun. Police said a man armed with an assault weapon pointed it at the officer, who fired his service weapon. Police said that the officer missed and that the man ran.

Police said the man dropped the gun. Detectives have identified a person of interest in the case.