A student at a suburban Denver 
high school set himself on fire in the school's cafeteria today and is 
in critical condition, authorities said.
A female teacher
 was treated for minor cuts when she broke a pane of glass to access a 
fire extinguisher and a school custodian used the extinguisher to put 
the fire out, Westminster Police Investigator Cheri Spottke told Drive Hot News 
The student, who is 16 but otherwise not identified, is in critical condition with severe burns, Spottke said.
The
 incident happened at 7:12 a.m. in the cafeteria of Standley Lake High 
School in Westminster, Colo. Police said students were present in the 
cafeteria at the time, but none were injured.
The
 school released a statement saying in part, "A student sustained severe
 burns when he entered the school cafeteria and lit himself on fire. The
 student has been transported to an area hospital and is in critical 
condition. Our hearts and prayers go out the family and school 
community."
"At this time we do believe that this was a suicide attempt," Spottke said.
Investigators
 do not know why the boy set himself on fire, and are talking to his 
friends, school employees and his parents for clues, Spottke said. They 
are also reviewing surveillance video from inside the school cafeteria, 
police said.
Police would not 
comment on whether the boy said anything before lighting himself on 
fire, or if he had doused himself in gasoline or any other accelerant.
Spottke
 told Drive Hot News, "We don't know of any threats ahead of 
time at this point but that's something that we're looking into 
obviously-social media and that type of stuff we're looking at to see if
 there were any threats made."
She
 added, "We're taking the most precautionary measures. Nowadays with 
everything that happens in these schools, we're going to go through the 
entire school- room by room, floor by floor, to make sure there's not 
any other devices or anything like that."
School is closed today and Tuesday, and counselors are being brought in to help, police said.
Today's incident was the latest to affect a Denver-area school in recent weeks.
On
 Thursday, Columbine High School, where two gunmen killed 13 people in 
1999, went on high security alert after receiving a series of 
threatening phone calls. The alert applied to a half-dozen other schools
 in the area, in the same school district as Standley Lake, but was 
lifted the same day.
On Dec. 
13, student gunman Karl Pierson, 17, fatally shot Claire Davis, a 
17-year-old classmate at Arapahoe High School in Centennial before 
killing himself in the school's library. Pierson reportedly had 
threatened a teacher and librarian who had disciplined him last year and
 allegedly was seeking that teacher when he entered the school, 
investigators have said.
Westminster
 was home to 10-year-old Jessica Ridgeway, who was abducted on her way 
to school and killed in 2012. Austin Sigg, who was 17 at the time of the
 crime, was sentenced to a life sentence plus 86 years. Jessica's 
disappearance put Westminster and neighboring Denver suburbs on edge as 
police, aided by an army of volunteers, searched for her and then her 
killer.