Forest Hills “High’’ was crawling Tuesday with NYPD school safety officers who confiscated students’ vape pens and stopped them from cutting class to toke — after three days of Post reports about the school’s rampant drug culture.

Students had to pass through metal detectors and let cops X-ray their bags on their way in to class — an unusual occurrence at the highly regarded Queens campus.

“These [safety] checks only happen like three times a year, and I just assume it happened [today] because of the news,” said a senior, Arber D., 18.

Teachers and parents have told The Post that the school has gone to pot as higher-ups turn a blind eye to the drug use. On Monday, The Post found two students smoking weed a half-block from the school right before classes.

The NYPD claimed Tuesday that the scanning was “in relation to an off-site non-school-related incident that occurred yesterday.” It did not elaborate on what the incident was.

Meanwhile, the beefed-up security wasn’t enough to deter some jonesin’ students.

“Danny had his [vape pen] taken away. But he just went and bought another one,” said a 17-year-old female senior. “So it’s not like it’s doing anything, honestly.”

Pot is banned in schools, but the NYPD can issue warnings rather than summonses under a DOE rule.

In addition to the metal-detection equipment, security officers were posted at side entrances and were spotted turning away kids who tried to sneak out for a midday toke.

The Post counted eight school safety vehicles patrolling the streets around the campus Tuesday — compared with just two the previous day.

Asked about the school’s pot problem — as well as accusations that officials refuse to address the issue — Schools Chancellor Richard Carranza said, “We are all working collectively to address issues at that school.”

Additional reporting by Tina Moore and Max Jaeger