They haven’t committed much crime in recent spree

year.

There were 103 in the same period last year, last year, data show.

The surge in shootings has many causes, Mayor de Blasio suggested at a news conference last week.

“There’s not one cause for something like this. There’s a lot of different pieces,” the mayor said, speaking of a spike in shootings in upper Manhattan.

He went on: “The fact that the court system is not working, the economy’s not working, people have been pent up for months and months, so many issues underlying this challenge.”

In the middle of a pandemic, with civil unrest and oppressive heat, the city exploded in violence last Sunday, with nine people shot dead.

Sunday’s deadly 24 hours capped a weekend not seen in a generation, with 11 murders — 10 of them by gunfire.

Sixty-four people were shot across the five boroughs in 48 different incidents, say police.

The last time the city saw such a chaotic, fatal weekend was 1993 or 1994, LiPetri said.

During the same three-day span in 2019, the city saw just six murders, with 16 shooting incidents and 21 people shot.

To get back on that kind of track, the NYPD will flood crime hotspots, including in Harlem.

Since last weekend, police have made just one arrest connected to the spree of gun violence, for a nonfatal shooting.

LiPetri wouldn’t say if police have recovered any guns linked to the mayhem, but he did say that “multiple suspects” in a number of the shootings, including some of the murders, have been identified and cases against them are being developed.

Half the shootings have been linked to street crews or gangs, and about six were drug-related.

The latter is no surprise, LiPetri said, given that only drug suspects labeled major traffickers can be jailed under the new bail reform laws.

Some of the gang shootings were revenge for prior shootings, LiPetri said.

A double murder in the Bronx last Sunday night — less than three hours after another man was gunned down in a drive-by while walking with his 7-yearold daughter — may have been retaliatory, he said.

Though the anti-crime units are gone, police will respond to the surge in street shootings and murders.

“We’re going to do what we do best,” said LiPetri. “We’re going to suppress the violence.”

The murder rate is up 27% over 2019 with 197, year-to-date. There were 155 by this time last year, stats indicate.