As many as eight people were injured in a shooting at Fort Hood, Texas Wednesday afternoon.
The base posted a statement online Wednesday.
It said emergency crews are on the scene.
NBC News reports one person is in custody and a possible second shooter is being sought.
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.