Capuchin monkey cracks tempered glass with stone at Zhengzhou zoo

A capuchin monkey was caught using a stone to smash the enclosure's glass at central China's Zhengzhou zoo on August 20.

The video shows the monkey picking up a stone and smacking it against the enclosure's glass window.

However, the tempered glass suddenly shattered when the monkey struck it for a second time, scaring the primate away.

According to a visitor, the monkey rubbed the stone on the ground for a while before using it to break the glass.

The zoo has cleared all stones up from the monkey's enclosure, reports said.