Related: National school walkout: When is it; what will happen
ENOUGH National School Walkout was organized by students working with the Women's March Youth Empower and occurred for 17 minutes at 10 a.m. across all time zones. It aimed to call for action against gun violence.
Networks owned by Viacom include MTV, Nickelodeon, BET, CMT, Comedy Central and Paramount Network, formerly named Spike. All participated in the programming suspension.
"In support of kids leading the way today, Nickelodeon will be off the air until 17 minutes past the hour," a message on the network read, according to The Los Angeles Times.
Related: School walkouts: What are students’ rights?
On Twitter, MTV aired a live Periscope broadcast profiling some teens and young adults who were moved to act against gun violence.
"Right now, students everywhere are walking out of school to take a stand against gun violence," MTV said on Twitter. "We stand with them."
"Viacom stands with all students as they participate in the national school walkout against gun violence," a message on BET's Twitter page read.
Viacom also said Shari Redstone, vice chair of Viacom’s board, would donate $500,000 to the March for Our Lives movement.