16 soldiers are recovering from injuries and four are dead after a shooting at Fort Hood Wednesday, including the gunman.
During a press conference Lieutenant General Mark Milley says it started at 4 p.m. in a medical building.
Early reports stated it started after an argument between two soldiers. Lieutenant General Milley could not confirm a motive but says the soldier entered the medical building on base and began firing a .45 semi-automatic handgun.
Then he got into a vehicle and continued driving and firing his weapon. Milley says he stopped at a second building and began shooting inside.
The Lt. General says in 15 minutes military police managed to respond. When confronted by a female officer the shooter shot himself in the head.
The incident does not appear to be terrorism but the Army says it is not ruling it anything out.
CNN reported the shooter as Army Specialist Ivan Lopez but the army has not confirmed a name stating it must first notify family.
Milley says the shooter had behavioral and mental health issues and was undergoing prognosis for Post Traumatic Stress Disorder. The shooter served four months in Iraq in 2011 and recently got to Fort Hood in February.
President Obama said his national security team was "working with folks on the ground to determine exactly what happened and to ensure that everyone is secure."
"The situation is fluid right now. ... Any shooting is troubling," the president said. "We're heartbroken that something like this might have happened again. I don't what on the comment on facts until we know exactly what happened. But just for now I would hope that everyone across the country keep the families of Fort Hood in our thoughts and our prayers. ... We don't yet know what happened tonight but obviously that sense of safety has been broken once again."
Connor said, "Unfortunately, this is something that we here at Fort Hood have experience with and this is something that is conjuring up a lot of memories of the past.
Fort Hood, in Killeen, Texas, was the site of a mass shooting in 2009, when Army psychiatrist Maj. Nidal Hasan killed 13 people.
During Hasan's trial, he called himself a "mujahedeen," or Muslim holy warrior, and did not deny he was the shooter. He was convicted and received the death penalty in August 2013.