A student who dressed as Darth Vader on Star Wars day has caused an evacuation at a US high school.
The student, who was celebrating popular sci-fi day, spooked a parent who then called police.
The parent at the Ashwaubenon High School in Wisconsin told police they saw a suspicious figure wearing all dark clothes and mask while carrying a large bag.
A police spokesman told a local Fox affiliate "that outfit actually looked like he might be wearing a bulletproof vest or a flak jacket".
School officials asked students and teachers to gather at designated rally points and put the school on lockdown.