After failing in his attempt to kill his ex-girlfriend, a teenager jumped off the fifth floor roof of a University Heights apartment building and lived.

Police were called to a private home at 2498 Devoe Terrace in University Heights after hearing reports of a fall victim. Upon their arrival, police discovered a seriously injured Jose Peguero, 18. A dozen police and firemen assisted in getting to Peguero and getting him out of the wooded backyard.

More police officers and a second EMS crew were called to 2492 Devoe Terrace for 17-year-old Tahiri Rodriguez, who reportedly has a child with Peguero, but broke up with him four months earlier for being abusive.

Rodriguez was reportedly punched in the face by Peguero, who then dragged her to the roof and slit her wrists while she was unconscious. Peguero then walked out onto the rooftop, ran and jumped off.

“I just heard running on the roof and he hit the trees,” said Kareem Burns, a fifth floor resident of the building.

Another witness and resident of the block who declined to give his name, said, “He looked like he was dead. He wasn’t breathing. I thought he was dead.”

The shaken-up witness said the young woman “looked like she was stressed out.”

Both victims were taken to St. Barnabas Hospital in critical condition, but both are now expected to survive.

A source says Peguero, a resident of Weeks Avenue, was released from the hospital and taken into police custody. Charges against Peguero are pending.