WICHITA — Four students at a middle school near Wichita are charged with conspiracy to commit first-degree murder in connection with a supposed bomb-and-shooting plot.

Names of the Haysville Middle School eighth-graders charged Monday in Sedgwick County were not released. It was not immediately clear if they were charged as adults, or if they have attorneys.

School officials have said the alleged threat surfaced last Thursday after social media posts indicated someone was plotting to bomb and shoot people on school grounds. Police identified the students behind the alleged threat and took them into custody.

The four defendants remain in custody, awaiting hearings.