Boy, 12, saves great-grandparents from ‘brutal attack’ by ‘wrestling a knife away from his older brother’

A YOUNG boy is being hailed as a hero after reportedly stopping his knife-wielding older brother from stabbing the boys’ great-grandparents to death.

Sacha, 12, and his brother Lucian Johnston, 20, were riding in the backseat of a car with their great-grandparents, ages 76 and 92, on Sunday in Texas, police said.

During the car ride, the couple allegedly told Johnston he couldn’t live with them anymore due to recent behavioral issues.

That’s when police say Johnston whipped out a pocket knife and began stabbing his great-grandparents in the head and neck.

Sacha told he wrestled the knife from Johnston – then held the weapon to his brother’s neck.

“I grabbed him from behind the shirt. I pulled him backwards, trying to get him away from grandma,” he said.

“I did grab the knife. I held that to his neck also. He bent back my finger, which is still sore.”

Johnston also head-butted his little brother, who said he suffered a loose tooth in the attack.

The 12-year-old told the news station he managed to get rid of the knife out of the car before his brother fled.

“I’m still looking at the knife in my hand, so I take it and throw it outside, shut and lock the door,” Sacha said.

“At least I was there to stop it.”

Harris County Sheriff Ed Gonzalez hailed Sacha as a “hero” and said he “truly prevented a double murder.”

The boys’ great-grandparents drove themselves to the hospital, where they were treated for their wounds, police said.

They were released Monday night, and deputies said the couple is expected to make a full recovery.

Cops arrested Johnston Monday morning, and he faces charges of assault with a deadly weapon.