Authorities are investigating social media threats that targeted Black students at Middletown Middle School, sheriff's and school officials said. Deputies said the investigation started Wednesday morning after four pictures were posted on Instagram and Snapchat that included threats to Black students. Investigators said no one student was singularly targeted. Subscribe to WBAL on YouTube now for more: http://bit.ly/1oJSRCN Get more Baltimore news: http://www.wbaltv.com Like us: / wbaltv11 Follow us: / wbaltv11 Instagram: / wbaltv11