Denver Police say the lockout has been lifted at the Denver School of Science and Technology, after a report of person with a gun at a school.
The school was initially put on lockdown, school officials confirmed. The lockdown was modified to a lockout at about 9:35 a.m.
During a lockdown, school business and classroom activities cease and everyone is down, quiet, and out of sight, according to the Denver Public Schools website.
During a lockout or modified lockdown, school activities may continue as normal with students securely moving within the school.
The school is located at Montview Boulevard and Valentia Street.
"No gun was been seen or has been found at this time," Denver Police tweeted at 9:40 a.m.
Police finished searching the school a little before 11:30 a.m. and the lockout was lifted.
Just yesterday, parents with students at the school got the following warning about a threat investigation last week:
Dear DSST: Stapleton High School and Middle School Families,
I am writing to share that Wednesday we were informed by Denver Public Schools Safety and Security that a threatening email was discovered on their server. Because the recipients of the email were affiliated with DSST: Stapleton and because the content referenced a future bomb threat, we took these allegations extremely seriously and moved quickly. After extensive investigation by the Denver Police Department Wednesday evening, they reached the conclusion that the threat was not credible. Despite this conclusion, there will be an increased presence of Denver Public Schools Safety and Security on campus tomorrow and Friday, simply as an extra precaution.
The purpose of this email is not to alarm you. Rather, we want to assure you that the safety of students and staff is our absolute top priority. We trust the conclusion reached by the police department and don’t have any reason to believe that there is a risk to students. However, we believe transparent communication is very important when it comes to the safety of our students.
Please don’t hesitate to share any information, either today or in the future, that can help us ensure the continued safety of our students. I am grateful for your on-going support of our campus community.
Campus Director, DSST: Stapleton
Police told Denver7 they do not believe last week's incident is connected to Thursday's investigation.