A senior at Cherry Creek High School in Greenwood Village has died, making it the second suicide by a student this semester, the school district told parents in a letter on Friday.

The school canceled instruction for the day. Instead, classes were used to “provide structure for our students, give students a sense of normalcy, and provide support as needed,” according to a copy of the letter obtained by The Denver Post.

The school also said parents could keep students at home.

“Today we are wholly focused on supporting our students at Cherry Creek High School who are in crisis right now,” district spokesperson Abbe Smith said in a statement. “Our hearts are heavy at Cherry Creek High School.”

Suicide prevention resources Colorado Crisis Line: 1-844-493-8255, coloradocrisisservices.org. Chat online or text TALK to 38255. Mental Health First Aid: mhfaco.org. Get trained to recognize the signs and how to respond. American Foundation for Suicide Prevention: afsp.org. Join one of their upcoming walks for awareness in Colorado. Crisis Text Line: crisistextline.org. Text 741741 from anywhere in the nation to reach a counselor. Second Wind Fund: thesecondwindfund.org. Links students to mental health professionals and pays for up to 12 counseling sessions.

The letter from the school did not say when the student died. But suicide has been highlighted in the last week as a public health crisis after the suspected suicides of two Parkland shooting survivors. A father of a child killed at Sandy Hook in 2012 also died by suicide this week.

Suicides, especially among youths, have increased across Colorado. Between 2015 and 2017, there were 533 suicides by those aged 10 to 24 years old. That’s up from the 340 teenagers and children who died by suicide between 2003 and 2005, according to a report by the state attorney general’s office.

In January, two middle school students in the Four Corners region died by suicide over a holiday weekend. And in October, two seniors at Arapahoe High School in Centennial died within three days of each other. Two months before, a 9-year-old boy killed himself after being bullied in school after revealing he was gay, according to his mother.

“After we help our students and families navigate the present crisis, we will engage our community in a discussion about the epidemic of suicide impacting young people here and across the country,” Smith said.