A student who survived last year’s shooting massacre at Marjory Stoneman Douglas High School in Parkland, Florida, died by suicide Saturday, according to local authorities. The unnamed student is the second Parkland survivor to die by suicide in a week, after 19-year-old Sydney Aiello’s death last weekend. Aiello suffered from post-traumatic stress disorder and survivor’s guilt, according to her mother. Seventeen students, staff and teachers were killed in Parkland on February 14, 2018, in one of the deadliest school shootings in U.S. history. David Hogg, a Parkland massacre survivor and gun control activist, tweeted Sunday, “How many more kids have to be taken from us as a result of suicide for the government / school district to do anything? Rip 17+2.”

You can reach the National Suicide Prevention Lifeline at 1-800-273-8255.