LAS VEGAS (KLAS) — A brief lockdown took place at Cheyenne High School on Monday, according to school administrators.

Anthony Nunez the principal at Cheyenne High School sent an email to parents informing them of an incident.

The lockdown was due to an altercation involving several students, Nunez stated in the email.

School administration and staff immediately worked to diffuse the situation, he added.

Cheyenne High School is located at 3200 West Alexander Road in North Las Vegas.

No other information was released by the school.

Another lockdown took place at Shadow Ridge High School on Monday.

Traci Kannon the principal of the school sent a letter to parents regarding the incident.

Kannon stated that the school was placed on a brief soft lockdown while police investigated an anonymous threat.

CCSD Police investigated the threat and deemed the matter unsubstantiated and students returned to regular learning activities, according to the letter from Kannon.