After the wall of a building collapsed and killed three primary school students and injured six others on Wednesday in Sichuan province, education experts, teachers and parents said not enough is being done to protect schoolchildren.

The fatal incident happened during the demolition of a building directly neighboring a primary school in Luzhou, Sichuan province, China News Service reported. Before it was torn down, the building was higher than the school's walls.

Several students, most of whom were second-graders between the ages of 7 and 9, were struck by falling debris from the demolition as they were cleaning the school grounds. Local authorities are currently investigating the incident.