CINCINNATI (AP) — Animal rights activists plan a Memorial Day vigil for the gorilla killed at the Cincinnati Zoo after a 4-year-old boy slipped into an exhibit and a special zoo response team concluded his life was in danger.

Anthony Seta (SAY'-tuh) calls the 17-year-old endangered lowland gorilla's death "a senseless tragedy" and says the Monday afternoon gathering is meant as a memorial to Harambe (huh-RAHM'-bay).

There has been a strong outpouring on social media of people upset the gorilla was killed Saturday. A Facebook page called "Justice for Harambe" created Saturday night has drawn wide attention.

Seta says Monday's memorial is meant as a tribute, not to point fingers at the zoo or the boy's parents. The boy hasn't been identified and his family says he is doing fine at home.