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REVERE, Massachusetts (WHDH) -- A chilling 911 recording released by authorities in Revere, Massachusetts gives a glimpse of the terror when two guard dogs mauled a young boy last week.

14-year-old Brandon Marchetti was severely injured when he was attacked after he climbed over a fence at a construction site near his home.

His father said the boy had played with the dogs in the past.

He knew that those dogs were friendly. He knew them by name. He didn't randomly do it. This is my son. This dog, I understand dogs are supposed to do their job, but these dogs were eating him," said Raymond Marchetti.

The dogs have been euthanized.

Brandon, meanwhile, remains hospitalized.