STEM School in Highlands Ranch was under lockdown after shots were fired on Tuesday afternoon.

UPDATED on May 8 at 4:22p.m.:
This is an on-going story. Please refresh the page for any updates.

The Douglas County Sheriff's Department has reported that one student has died following a shooting at a school in Highlands Ranch. The student has been identified as 18-year-old Kendrick Castillo.

It is with extreme sadness that we can confirm that 1 student at the STEM School was killed in today’s #stemshooting incident. The immediate family has been notified. Douglas County Coroner Jill Romann has not officially identified the student is stating it’s an 18 year old male.

— DC Sheriff (@dcsheriff) May 8, 2019

#BREAKING UPDATE:
Littleton Adventist Hospital confirmed they have victims from the #stemshooting in Highlands Ranch. SkyRidge also says they have two victims in stable condition. https://t.co/zaLM5QID4H

— CBSDenver (@CBSDenver) May 7, 2019

Here's what we know on #StemShooting:
8 injured. 2 shooters in custody.

Children’s hospital has 1 patient in good condition.
Littleton Adventist has 5 patients. 4 serious and 1 fair condition. (from @MikaylaOrtega7)
Sky Ridge - 2 patients. Both juveniles. STABLE. (from @JGonTV)

— Jace Larson Denver7 (@jacelarson) May 7, 2019

Two suspects are in custody, and according to the sheriff's office, one is an adult male and the other a juvenile female. Suspects have been confirmed as students of STEM.

Unstable situation, shots fired at STEM school at Ridgeline and Plaza. Avoid area. Media go to north side of AMC

— DC Sheriff (@dcsheriff) May 7, 2019

The STEM School educates 1,800 students in K-12 and is located off South Ridgeline Road and Plaza Drive.