While NYC was in complete dragnet mode Wednesday trying to capture Brooklyn shooting suspect Frank James, 62, knivings and shootings went through the roof on or near subways.

A teenage boy was shot just outside the Barclays Center — the largest transportation hub in Brooklyn — in broad daylight during the Wednesday evening rush hour, cops said.

The victim was struck by gunfire around 5:30 p.m. at the intersection of Flatbush and Atlantic Avenues, near the train station and LIRR terminal, according to police.

Earlier in the day three teens were knifed in two separate incidences while going to school.

Two teens were stabbed at separate New York City subway stations less than an hour apart on Wednesday morning, police and sources said.

In the first attack, a 16-year-old boy was stabbed in the arm aboard a 3 train at the Sutter Ave – Rutland Road station in Brownsville at about 8:10 a.m., sources said.

His attacker fled and had not been arrested by early Thursday, sources said. The victim was taken to Brookdale Hospital in stable condition.

About 30 minutes later, a 14-year-old boy was stabbed in an unprovoked attack on the platform at the 90 Street-Elmhurst Avenue station in Jackson Heights, Queens police said.

The teen was targeted by an unknown suspect after he exited a southbound 7 train. The assailant, without saying a word, approached the victim and stabbed him with a sharp object in the abdomen, cops said.

The suspect fled the station and was still being sought Thursday.

Police said the victim was taken by EMS to Elmhurst Hospital in stable condition.

The mayhem continued earlier in the day as two men were stabbed during a fight on a Harlem train platform early Wednesday, cops said. 

The male suspect knifed the victims, aged 19 and 20, on the southbound No. 2 train platform at the 135th Street station around 1 a.m., according to police. 

Both were walked into Harlem Hospital for treatment, and are listed in stable condition. 

Remember all these crimes happen after reporting yesterday that three people were killed and at least 13 others were wounded in a series of shootings that rocked parts of the Bronx and Brooklyn late Tuesday and early Wednesday, police reported.

NY Mayor Eric Adams said Wednesday, “Where are all those who stated ‘Black Lives Matter?’ ”

“Do an analysis of who was killed or shot last night. I was up all night speaking to my commanders in The Bronx, in Brooklyn. The victims were black,” the mayor added.

The fatalities included a 23-year-old woman and two men, 22 and 21, all killed in separate Bronx shootings. At least five other shootings were reported in New York City during a roughly six-hour span, authorities said.

All these incidents occurred during the first real warm days of the year, which does not make for an optimistic outlook for the near future.

And will probably lead to more sleepless nights for Adams, if he can’t get this city under control anytime soon.