FORT HOOD, Texas -

Four people are dead, including the gunman, and 14 others are hurt in a shooting at Fort Hood. The post has been locked down and everyone ordered to shelter in place.

CNN reports that the gunman is dead.

The order was sent Wednesday on the base's Twitter feed and posted on its Facebook page.

The 1st Calvary Division, which is based at Fort Hood, sent a Twitter alert telling people on base to close doors and stay away from windows.

Fort Carson released the following statement about the Fort Hood shooting late Wednesday:

"Our thoughts and prayers go out to those affected by the shooting at Fort Hood today. Fort Carson has immediately implemented prudent security measuresto ensure the safety of our Soldiers, Civilians and Families and thus visibleextra security measures at all access gates should be expected for theforeseeable future. We ask all personnel to report suspicious activityimmediately."

The base was the scene of a mass shooting in 2009. Thirteen people were killed and more than 30 wounded in what was the deadliest attack on a domestic military installation in history.