SYDNEY, Australia—A 7-year-old boy broke into a popular Outback zoo, fed a string of animals to the resident crocodile and bashed several lizards to death with a rock, the zoo’s director said Friday.

The 30-minute rampage, caught on the zoo’s security camera, happened early Wednesday after the boy jumped a security fence at the Alice Springs Reptile Center in central Australia, said zoo director Rex Neindorf.

The child then went on a killing spree, bashing three lizards to death with a rock, including the zoo’s beloved, 20-year-old goanna, which he then fed to “Terry,” an 11-foot, 440-pound saltwater crocodile, said Neindorf.

The boy also fed several live animals to Terry by throwing them over the two fences surrounding the crocodile’s enclosure, at one point climbing over the outer fence to get closer to the giant reptile.

In the footage, the boy’s face remains largely blank, Neindorf said, adding: “It was like he was playing a game.”

By the time he was done, 13 animals worth around $5,500 had been killed, including a turtle, bearded dragons and thorny devil lizards, Neindorf said. Although none were considered rare, some are difficult to replace, he said.

“Alice Springs police said they are unable to press charges against the boy because of his age.

Neindorf said he plans to sue the boy’s parents.