New data reveal the police department seized more weapons from students in city schools last academic year — and some parents say they are worried the numbers this year will be even worse. NY1's education reporter, Lindsey Christ, has the story.

Tuesday, a semi-automatic pistol was confiscated from an 11-year-old at PS 40 in Queens. Two days later, a 15-year-old was caught with a .38-caliber revolver at York Early College Academy, also in Queens. Both guns were loaded.

Capping off the week, a group of education advocates critical of Mayor Bill de Blasio stood on the steps of City Hall, armed with new data from the NYPD showing weapons seizures were up overall last school year.

"In every single category, weapons in our schools are rising," said Joe Herrera of Families for Excellent Schools. "And yet according to Mayor de Blasio, our schools are safer than ever." 

The total number of weapons confiscated in schools rose from 1,347 two years ago to 1,678 last year.

The number of firearms jumped from 10 to 13. The number of stun guns or tasers skyrocketed from 4 to 62, and knife seizures rose from 647 to 873.

The data come from the NYPD Division of School Safety, but it was released by Families for Excellent Schools, a pro-charter school, anti-de Blasio advocacy group that has recently focused on school safety.

Parents involved with the organization shared stories of their own children's' struggles with bullying and violence.

"Two weeks into the school year he was jumped by two boys," parent Lisa Vines said about her son.

"Somebody tried to stab her with some scissors in school," Omar Quintero said.

"Schools must be safe havens...and there is absolutely zero-tolerance for any weapons in schools," a spokesperson for the city's education department said in a statement. "We work in close partnership with NYPD and there are clear protocols in place to address any incidents swiftly." 

The debate over school violence comes as the city is finalizing plans to remove metal detectors from some schools. 

"This is very complicated. It's going to be done over time, but I do expect that certainly when we start in September, some of these decisions will have been made," Schools Chancellor Carmen Fariña said Wednesday.

There were no metal detectors in either of the schools where guns were seized this week.