The Marine Corps Air Ground Combat Center (MCAGCC) at the Twentynine Palms installation in California has been placed on lockdown following reports of rounds fired, according to the center, which was announced on Monday.

“We have received reports of shots fired on board MCAGCC. The MCAGCC Provost Marshals Office is currently responding to the situation. The installation has entered a lockdown state and all personnel are required to shelter in place,” the center said via Twitter.

We have received reports of shots fired on board MCAGCC. The MCAGCC Provost Marshals Office is currently responding to the situation. The installation has entered a lockdown state and all personnel are required to shelter in place. We will issue updates when available.

— The Combat Center (@CombatCenterPAO) May 23, 2022

The reports of shots fired came in at 8:52 am local time and were anonymous, according to the center. The situation is evolving, and updates will be provided as they become available, according to the center.

MCAGCC Base Twentynine Palms LOCKDOWN Monday Morning Amid Active Shooting https://t.co/w4m5pJHt1X

— THECOUNT.COM ™ (@THECOUNTnews) May 23, 2022

The MCAGCC at Twentynine Palms is the largest US Marine Corps base, spanning over 900 square miles and housing over 8,400 personnel.

No other details were immediately available.