A toddler tragically fell to her death at an apartment building in Changsha, central China’s Hunan province, after being deliberately left alone by her playmates in an elevator going up to an 18th-storey floor with no guardrail protection.

The 2-year-old girl, who went by the nickname Lili, was playing with two other children, including a five-year-old boy, in their apartment building on July 3. Surveillance footage shows all three children going up to the ninth floor together. The boy is later seen reaching high to press the 18th-floor button before they exit.

After all three children exited, the boy is seen picking up Lili and putting her back into the elevator. He also watched the door to make sure she did not run out before it closed.

Lili stood nervously close to the door as the elevator went up. When it reached the 18th floor, footage shows the toddler exiting before disappearing from camera.

A later investigation showed that the 18th floor lacks a protective guardrail and has no protective glass, leaving the building open to the outside.

The heartbreaking incident has stirred the emotions of many Chinese netizens, who have called for better care and responsibility for young children. Many also blamed the 5-year-old boy, as the juvenile prank appeared to be intentional murder.

Police are currently investigating the case. It is unclear who will be held responsible for the girl’s untimely death.