The San Diego Unified School District Monday continued investigating the extent of a data breach by a third-party software company impacting students in the district. The data breach was announced last week by PowerSchool, a student information system used by more than 70% of school districts across the country and serving more than 60 million students and teachers. The company detected the leak on Dec. 28. Previous coverage: San Diego Unified School District Jan 10 Social security numbers of some SDUSD students may have been accessed in data breach San Diego Unified School District Jan 7 San Diego Unified alerts families of cybersecurity incident involving student data The district — the second largest in California — sent emails to the families of its nearly 100,000 students that their children may have had information leaked. According to W. Drew Rowlands, SDUSD’s deputy superintendent of operations, the company informed the district the information taken was primarily contact information such as names, addresses and phone numbers. Highly sensitive information such as social security numbers and certain medical conditions — such as if the student wears glasses, has food allergies or asthma — may have also been stolen. “No detailed medical information was impacted,” Rowlands said. “PowerSchool is working with urgency to complete their investigation and determine whether [personally identifiable information] belonging to our students was included. “If your student is one of those affected by the release of PII, you will be offered support from PowerSchool in the coming days, such as credit monitoring or identity protection services.” PowerSchool has hired a cybersecurity firm to determine the nature of the data breach, which happened on a national level. San Diego Unified is the only local district to have confirmed compromised data from the incident, but the full extent is not yet known.