As an officer turned over the victim and attempted to stem bleeding, the crowd began shouting and moved closer, Blair said. Other officers at the scene put out an "assist officers" request, and police from other area departments including Ridley and Chester Townships responded.
"This is the stuff officers have to deal with on a daily basis," Blair said.
During the first seven months of the year, 17 homicides were recorded in Delaware County's only city, according to the state's Uniform Crime Reporting System. During the last 10 years, the annual average has been about 20, with just over half of those occurring after Aug. 1.
In the Sunday night incident the wounded man later died at Crozer Chester Medical Center, said Blair. His identity has not yet been released by police.
On Friday morning, police were called to the 300 block of Rose Street for a fatal shooting. They found a 36-year-old Hispanic male, a Chester resident, with a gunshot wound to the chest. He was later pronounced dead at Crozer Chester Medical Center.
That man recently had been released from jail, Blair said. His identity is being withheld pending notification of family, he said.
About 3 a.m. Monday, an officer in the area of Ninth Street and Avenue of the States, near the heart of the business district, heard gunshots. While investigating, he came upon the body of a 23-year-old Chester man on the pavement near Eighth and Welsh Streets, about two blocks away. The man was pronounced dead at the scene, Blair said.
His identification has not yet been relased.
Police also were looking for the driver of a tan colored SUV, possibly a GMC Yukon, who may have information in the fatal hit-and-run of a 63-year-old Chester man on Sunday morning. The victim was struck in the 400 block of Flower Street, Blair said.
Anyone who had information is asked to call Chester Police at 610-447-7931.