Police in US state of Ohio are going to look into shooting of 17-year-old gorilla at Cincinnati Zoo. They will investigate facts around the killing of Harambe the gorilla after four-year-old boy fell into ape's enclosure on Saturday. Video footage showed the gorilla dragging the boy through shallow water in his cage for up to ten minutes. Some people who were at zoo said they were worried about the little boy's safety. Other people said the gorilla was trying to protect child and that animal was becoming upset by the noise from the crowds of people looking at event. Zookeepers made a decision to shoot the gorilla because they feared for boy's life.
Animal rights groups are very angry that gorilla was shot and killed. They say zookeepers should have used tranquilizer gun on the animal to put it to sleep. Zookeepers say it would have taken too long for 200kg gorilla to be sedated. They say this would have been too dangerous. There is now online petition that 300,000 people have signed to hold boy's mother and the zoo accountable for Harambe's death. Many people say mother should have looked after her son better to stop him from falling into gorilla's area. The mother said no parent in world can watch their children every second. She said: "As a society, we are quick to judge how parent could take their eyes off their child."