A 16-year-old student at Montgomery Blair High School in Silver Spring accused of stabbing another student on Monday has been charged with attempted murder, Montgomery County police said on Tuesday.

On Tuesday, the day after the alleged stabbing at Blair, a relative of the accused student took a knife to Blair, Principal Renay Johnson wrote in another letter to families. After the family was notified, police took the relative into custody, she wrote.

Johnson wrote in the letter that the relative is also a student.

Police said the student accused of Monday’s stabbing been charged as an adult with attempted second-degree murder, first-degree assault and reckless endangerment. Bethesda Beat generally doesn’t name juveniles charged with crimes.

Police said on Monday that the stabbing happened in the school’s parking lot and the victim was taken to a local hospital with injuries not considered life threatening.

Johnson wrote in a letter to families on Tuesday that the victim has been released from the hospital and is recovering at home.

In a bond review hearing Tuesday afternoon, prosecutor Kyle O’Grady said the altercation between the students began in a McDonald’s parking lot nearby and later shifted to the school parking lot.

O’Grady said the victim suffered a puncture wound on his back near the spinal cord and had shoulder injuries. He was taken to a hospital and was in critical condition, O’Grady said.

Johnson wrote in a previous letter Monday that the school was initially put on lockdown after police were called. The lockdown was later modified to shelter in place, meaning classes could resume.

Montgomery County District Court Judge Holly D. Reed III ordered the alleged stabber to be held without bond on Tuesday in an adult facility. Reed said the “violent nature” of the allegations could create a danger if the teen is held in a juvenile facility.

Johnson added in the letter that county police would be on campus Tuesday to help “support school security efforts” and that counselors would be available.

Dan Schere can be reached at daniel.schere@bethesdamagazine.com