Officials end lockdown at Arizona Air Force base

Officials had sent an email to personnel shortly after 10 am MST with the word “LOCKDOWN” written three times in all-caps, followed by an alert of an “active shooter.”

They later said in a news release that reports of gunshot sounds were unconfirmed. Two schools are also inside the base. Both said all students were safe and unaccounted for.

About 10,500 people work on the Tucson base.

The base is home to the 355th Fighter Wing, which provides training and deploys the A-10 jet.