As the nation reeled from reports that at least eight people — most of them students — were killed in a shooting Friday morning at a high school in Southeast Texas, survivors of past school shootings took to social media to express condolences, outrage and empathy to a new school community facing tragedy.

The activists forged by the February shooting at Marjory Stoneman Douglas High School in Parkland, Fla., which killed 17 people, were quick to place the blame for the Sante Fe massacre squarely on politicians, whom they accused of not having acted swiftly or strongly enough to end these types of killings.

Parents of school-shooting victims echoed the students’ outrage.

For many, the scenes out of Texas were all too reminiscent of what they lived through just three months ago.

[The toll of gun violence at schools since Columbine: At least 139 killed, at least 277 injured]

Students being led out of school in a line by police. Chaos and confusion as friends and family tried to locate loved ones. Children crying in their parents’ arms. Police vehicles surrounding the school campus.

Harris County Sheriff Ed Gonzalez said “between eight and 10 people” were killed in the attack Friday morning. A male student was taken into custody, and a second person, also a student at the school, was taken in for questioning.

Student activists who in March led hundreds of thousands of people in a Washington rally against gun violence, dubbed the March for Our Lives, said this latest incident serves as yet another reason to continue their work.

No national events protesting gun violence have been planned since the April 20 school walkouts that marked the 19th anniversary of the shooting at Columbine High School in Littleton, Colo. Student activists have said that they will turn their attention to voter registration and political activism in hopes of affecting the midterm elections this year.

On Friday morning, some student activists called out the National Rifle Association in their online posts, noting the amount of campaign contributions received by some Texas lawmakers from the group.

Beneath it all, survivors of the Parkland shooting and others before them seemed to be searching for an answer to one fundamental question: