JOHNSTON, Iowa (AP) – A suburban Des Moines district plans a late start to school Wednesday so buildings can be checked. Johnston Community School District officials decided Monday night to cancel classes for Tuesday because of anonymous and threatening texts parents and others received around 8 p.m. Monday. Johnston Police Chief Dennis McDaniel said at a news conference Tuesday that federal, state and local investigators couldn’t substantiate “any credible or imminent threat.”

The district says the two-hour delay means secondary students will start at 9:45 a.m. and elementary students will start at 10:35 a.m. Classes will be dismissed at a normal time – not the Wednesday early release time. Extra officers will be stationed at the schools. The closure affected about 7,200 students and 1,000 employees.