PHILADELPHIA (WPVI) -- Police are investigating a barricade situation that took place in the Kensington neighborhood of Philadelphia on Sunday.
Officials believe the incident began as a fatal double shooting on the 2800 block of Kensington Avenue just before 2 p.m.
Officers say a 37-year-old man was shot three times and was transported to Temple University Hospital, where he is in stable condition.
The other victim, a 20-year-old man, was shot multiple times and pronounced dead at the scene.
Police say the alleged offender, a man wearing a mask, hoodie, and black shorts, ran into apartments above a nearby storefront and refused to come out.
That's when officials declared the situation a barricade.
Officials say after a brief standoff with Philadelphia SWAT, a possible suspect surrendered.
Residents in the area say the day began like any other, but that quickly changed when the shooting started.
"Everything was normal, cars going past, buses going past, then I just heard somebody unleash at least 12 shots or more. Like, 'Pow! Pow! Pow!'" recalled Antonio Patterson.
Patterson witnessed everything up close, which only reminded him of his own experience with gun violence.
He told Action News he was shot four years ago when he was 20 years old.
"Once he shot me, I was instantly paralyzed. Couldn't move my legs, from the waist down, I couldn't move anything," he said.
Now, he depends on a cane to get around.
"It definitely brings my PTSD back when I heard the shots," said Patterson.
He also said that he hopes something will change soon, so more people aren't impacted by the ongoing violence.
"It's senseless killings, every single day by young people. It just doesn't make any sense," he said.