Baltimore Police arrested a 32-year-old man Tuesday in connection with a shooting last month that killed a 66-year-old.
The suspect is believed to have shot and killed Eric Gill on Aug. 31 in North Baltimore.
Police said two people were killed and another injured in three separate shootings early that Thursday.
Northeast District officers arrived around 6:21 a.m. at the 6100 block of Edlynne Road in Glen Oaks for a report of a man laying in the street. When they arrived, they found Gill with a gunshot wound.
Medics responded to the location and pronounced Gill dead on the scene.

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Also that morning, Southern District officers arrived around 12:43 a.m. at the 3500 block of Round Road in Cherry Hill for a report of a shooting. Once there, officers found Nina Dooley, 57, suffering from a gunshot wound.
The victim was transported to an area hospital, where she later died.
Additionally, Northeast District officers were called to an hospital around 6:46 a.m. for a report of a walk-in shooting victim. Officers found a 42-year-old man suffering from non-life-threatening gunshot wounds.
Investigators learned the man was walking near Loch Raven Boulevard at East Northern Parkway when he was shot.
Homicide detectives are asking anyone with information on the two people killed to contact them at 410-396-2100. Northeast District detectives are asking anyone with information on the walk-in shooting victim to contact them at 410-396-2444.
Regarding any of the shootings, people who want to remain anonymous can call the Metro Crime Stoppers tip line at 1-866-7LOCKUP or submit an anonymous online text tip by visiting the MCS website.
Baltimore Sun reporter Dan Belson contributed to this article.