Five people were killed and at least 40 more were wounded in shootings across Chicago between Friday evening and Monday morning.

The weekend’s latest homicide happened Sunday afternoon in the Brighton Park neighborhood on the Southwest Side.

Gregory Chacon, 19, was shot in the chest and arm about 3:30 p.m. in the 3900 block of South Kedzie, according to Chicago Police and the Cook County medical examiner’s office. Chacon, who lived in the 4300 block of South California, was taken to Mount Sinai Hospital and pronounced dead at 4:25 p.m., authorities said. The circumstances of the shooting were unknown, but police said it likely was gang-related.

More Southwest Side gunfire left a 20-year-old man dead in West Elsdon early Sunday.

About 2:10 a.m., Jesus Martinez Jr. was driving in the 5500 block of South Kostner when a black car pulled alongside him at a stop sign and someone inside it opened fire, authorities said. Martinez was shot in the back and taken to Christ Medical Center in Oak Lawn, where he died at 7:23 a.m., authorities said. He lived in the 5700 block of South Kilbourn.

Saturday afternoon, a 25-year-old man was gunned down in the Roseland neighborhood on the Far South Side.

About 1:35 p.m., Deandre Gray was sitting in a car parked in the 10400 block of South Wentworth when someone walked up and shot him in the head, authorities said. Gray was taken to Christ Medical Center, where he was pronounced dead at 3:37 p.m.. The shooting happened a half-mile from his home in the 10700 block of South Wentworth.

A northwest Indiana man was slain in the same neighborhood less than 24 hours earlier.

About 6:15 p.m. Friday, officers responding to a call of a person down found 20-year-old Tabari Freeman unresponsive in the back yard of a home in the 10700 block of South Edbrooke, authorities said. Freeman had been shot multiple times and was pronounced dead at the scene at 6:31 p.m. He lived in the 7500 block of Whitcomb Street in Merrillville, Indiana.

The weekend’s first fatal attack happened about 4:30 p.m. Friday in the South Side Englewood neighborhood.

Ernest Hudson, 18, suffered a gunshot wound to the head in the 6400 block of South Lowe and taken to St. Bernard Hospital, where he died at 4:55 p.m. Hudson lived in the 6500 block of South Green, authorities said. The circumstances of the shooting were unknown.

The latest nonfatal attack happened about 2:25 a.m. in the Bronzeville neighborhood on the South Side. Three men were sitting in a vehicle in traffic about 2:25 p.m. in the 3500 block of South Indiana when someone in a black SUV opened fire, police said. A 39-year-old was taken in critical condition to Stroger Hospital with gunshot wounds to the head and left leg. The other two, both 32, were taken to Mercy Hospital, where their conditions were stabilized. One was shot in the left shoulder, and the other was shot in the left hand.

At least 37 more people were wounded in shootings across Chicago between 7 p.m. Friday and 2:30 a.m. Monday.