Hundreds of students at schools on overseas military bases took part in a protest Wednesday morning to highlight gun safety issues, Stars & Stripes reports.

The protests were organized in light of the Feb. 14 killings of 17 students at a high school in Parkland, Florida. Using the hashtag #EnoughisEnough, the protests were to take place at 10 a.m. Wednesday for 17 minutes.

Many schools sought to accommodate the students, but “one threatened students with potential punishment and referral to military police,” according to the Stripes article.

Seoul American High School at Yongsan Garrison in Seoul, however, warned students against participating in the walkout, citing U.S. Forces Korea policy that prohibits protests on military installations.