UPDATE 12:50 p.m.

HUNTSVILLE, Ala. (AP) — The commander of an Alabama military post says two 911 calls about a potential active shooter prompted a lockdown at the installation but no shooter was ever found and no shots were fired.

Col. Tom Holliday, the garrison commander at Redstone Arsenal near Huntsville, said Tuesday afternoon that the 911 calls came from a building on the installation. He says the lockdown worked as planned and believes that the military post did not overreact.

He says there will be an investigation and officials are looking into the possibility of a hoax.

More than 30,000 government employees, civilians and contractors work daily at Redstone, which adjoins the city of Huntsville and is home to Army missile defense programs and other military offices.

NASA’s Marshall Space Flight Center, which oversees rocket propulsion operations, also is located at Redstone.

An active shooter drill planned for Wednesday will not be held.

(© Copyright 2017 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)

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