Evidence suggests their intent was to carry out acts of violence at a school in the Spring Branch Independent School District, law enforcement said.

Two teenage girls arrested Wednesday are accused of plotting "a mass casualty attack" at Memorial High School in Spring Branch ISD, according to authorities. The Spring Branch ISD police department was initially notified by the FBI of a potentially credible threat against the school on Tuesday and arrested the student involved,

Two teenage girls accused of planning a "mass casualty attack" to bomb and shoot up a Houston-area high school were arrested, authorities said.