Four people were killed and another 19 were injured, including a 10-year-old boy walking home from the store, in a wave of shootings over the weekend that touched all five of New York City's boroughs.

Brooklyn saw the most bloodshed, with 11 people hurt in seven separate shootings, police say. Five people each were shot in Manhattan and the Bronx. There was also one shooting each in Queens and Staten Island.

On Saturday in Queens, a man was fatally shot in the head. Then on Sunday, one man in Brooklyn and another in the Bronx were killed. Early Monday, a 55-year-old man died after being shot in the neck in the Bronx.

The injured included a 16-year-old boy who was shot in Harlem, a 10-year-old shot in Brooklyn and a 12-year-old shot in the leg in the Bronx.

The 10-year-old boy was struck by a bullet as he left a corner store in Coney Island, heading home. His parents heard the shots from the sixth-floor apartment.

"When they tell you your son got shot, you don't know if he is dead or alive," Kamal Ismail, his father, told NBC 4 New York on Monday.

Despite the weekend spike in violence, the volume of shootings so far in 2014 is lower than it was last year, police say.

"We're always concerned about any shootings, but we have 1,200 additional cops this week," Police Commissioner Bill Bratton said, referencing recruits that will graduate from the NYPD's police academy Monday.

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Veronica Tutton, who lives in the Kingsbridge Heights section of the Bronx where two men were shot Sunday afternoon, said she is considering moving her family out of the neighborhood.

"I don't take my little ones outside much,” said Tutton. “And that's sad because I have a 6-year-old and he's always wanting to go to the park and play, and, as you can see, it happened right next to our park."

--Lori Bordonaro contributed to this story