Los Angeles students and teachers return to class for the new academic year Thursday under a cloud of apprehension after a summer filled with immigration raids and amid worries schools could become a target in the Trump administration’s aggressive crackdown.

Los Angeles schools reopened under a climate of fear following a summer of immigration raids, raising concerns about student safety and attendance. LAUSD Superintendent Alberto Carvalho urged federal agents to avoid school zones and introduced measures like revised bus routes and family preparedness packets.

Some undocumented mothers in Los Angeles told CBS News they are unwilling to risk sending their children to school at all.