BOISE, Idaho — Hundreds of students flocked to the Idaho Capitol to participate in a national walkout to protest gun violence.

Wednesday’s walkouts came after a gunman killed 17 students last month at Marjory Stoneman Douglas High School in Parkland, Florida. Many students were stepping outside for 17 minutes, one minute for each person fatally shot at the Florida school.

Students in Boise held signs that read “my dress code is stricter and chanted our gun laws” and chanted “no peace, no justice” inside the Capitol’s rotunda while lawmakers were voting on bills. The students’ chants and roars could be heard on the House and Senate floors.

Both students and speakers said they want Congress to pass laws aimed at preventing mass shootings, including increased background checks for gun buyers.