OCCIDENTAL, Calif. - A student's father made a threat on social media, which led to the lockdown of two schools in Sonoma County on Monday, officials say. Now the father has been arrested.

Two schools in Sonoma County were placed on lockdown Monday following what authorities called a “credible” threat. Approximately 220 students at Harmony Elementary and Salmon Creek Middle School, which share a campus in Occidental,

The Sonoma County Office of Education (SCOE) said a threat posted on social media by a student’s father caused two schools to go into lockdown Monday morning. SCOE said the online threat is being handled by the Sheriff’s Office in an ongoing criminal investigation.