Both men were pronounced dead at Albert Einstein Medical Center.
As of last night, police had made no arrests. They were attempting to determine if the men shot each other or if there was a third party involved.
At the 11th Street scene, police found a gun and spent cartridge casings, but the calibers of the gun and the casings did not match one another, Cooney said.
Patterson is believed to have run from the scene of Cartwright's shooting to where he collapsed at Warnock Street near Louden, police said.
Just minutes after Homicide Detectives responded to that incident, Northeast Detectives were called to a triple shooting outside of a bar on Oxford Avenue near Frontenac Street in Oxford Circle.
Police said three men were shot outside of TD's Bar following an argument.
The victims - a 26-year-old who was shot once in each leg, a 20-year-old who was shot once in the left hip and a man of an undetermined age who was grazed in his right leg - were all taken to Aria Hospital's Frankford campus in stable condition, police said.
Northeast Detectives said the fight didn't start in the bar and doesn't appear to have anything to do with the establishment.
The victims have given no information as to who shot them or a possible motive for the shooting, detectives said.
The weekend violence started with a double shooting in Germantown Saturday evening that left two women clinging to life.
About 8:20 p.m. on Wister Street near Sprague, a 31-year-old woman was shot in the chest and a 20-year-old woman was shot in her back, police said.
Both women were taken to Albert Einstein Medical Center, where they remain in critical condition.
Police are still searching for suspects and motives in all three cases.