AKIPRESS.COM - The director of an Ohio zoo on Monday defended the killing of a critically endangered gorilla as it dragged a young boy who had fallen into its enclosure in a horrifying incident captured on video, according to VnExpress International.

Harambe, a 17-year-old male western lowland silverback gorilla, was shot after the four-year-old crawled through a barrier and tumbled 4.5 meters into the Cincinnati Zoo enclosure on Saturday.

Video footage shows the creature yanking the boy through a water-filled moat while onlookers scream.

At one point, the huge animal stops and appears to hold the child's hand before pulling him out of view.

Zoo officials said they were heartbroken over the loss of Harambe, but had to make a rapid choice on how to rescue the boy.

"We did not take the shooting lightly. But that child's life was in danger and people who question that, or are Monday morning quarterbacks or second guessers, don't understand that you can't take a risk with a silverback gorilla," zoo director Thane Maynard told reporters.

The huge gorilla was about six times stronger than a man, Maynard added, and was confused and disoriented.

The zoo said tranquilizing the animal was not an option because a dart could have startled the already-agitated creature, causing it to act aggressively before the sedative kicked in.

Further, Maynard said the barrier met all industry standards but the zoo would nonetheless review all of its enclosures.

The boy's name was not released, but his family issued a statement to U.S. media offering their "heartfelt thanks" to the zoo.

Still, angry animal lovers expressed outrage that the child had slipped into the enclosure.