The death of a New Jersey middle school student earlier this summer was ruled an overdose of two of the deadliest drugs.

An autopsy released Monday revealed that 13-year-old Vincent Weiner died from a “deadly heroin mixture” that contained fentanyl, news station KYW-TV reported.

The Middle Township Middle School student was found unresponsive in bed June 4 at his grandparents’ Rio Grande home.

His mom, Jamie Lund, said the seventh-grader had been bullied in the weeks before his death.

“The two weeks or so prior [to Vincent’s death] there had been unusual behavior at school, it was discovered that he had been cutting. And stories of bullying in school began to surface,” Lund told news station WCAU.

More than two months after his death, it’s not known how the 13-year-old got hold of the deadly drugs.

Lund pleaded for answers Saturday in a Facebook post.

“Whoever is supplying these babies with drugs, needs to be stopped!” Lund wrote.

The Cape May County Prosecutor’s Office said Monday that the fentanyl contained in the lethal mixture is approximately 100 times more potent than heroin. Prosecutors said in a statement Monday that “no one is immune from this epidemic, whether young or old.”

Anyone with any information about his death is asked to call police at 609-465-8700.