Getting your Trinity Audio player ready...East Palo Alto and Menlo Park police officers responded to a threat at The Primary School on Sept. 23. Courtesy East Palo Alto Police Credit: East Palo Alto Police via Bay City NewsThe Primary School in East Palo Alto was temporarily locked down and searched on Tuesday afternoon after an unidentified caller threatened to “shoot up” the school, according to the East Palo Alto Police Department. Officers from East Palo Alto and Menlo Park police departments responded and proceeded to secure and search the school, according to the police. Located at 2086 Clarke Ave., The Primary School was founded by the Chan Zuckerberg Initiative to support low-income children in East Palo Alto. The East Palo Alto Police Department is investigating the incident to identify the individual responsible for the threatening call.