UPDATE:

The wife of Ivan Lopez, the soldier who killed three people and left 16 wounded, was reportedly "hysterical" after finding out that her husband was the gunman. 

The wife of the 34-year-old gunman is believed to Karla Lopez, who moved to the Killeen area with her husband and their child in February.

Xanderia Morris, a neighbor of the family, told CNN that Lopez came out of her home in tears once news broke of the shooting and was concerned that her husband could have been the victim. "She was worried and she was crying. I tried to console her and comfort her, let her know everything was okay."

However, when the news developed and she found out that her husband was the gunman and had shot himself, she went "hysterical." She has since been taken by officials and is cooperating investigators.

Karla and Ivan Lopez have a daughter, who is about 3 years old.

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A soldier opened fire at Fort Hood military base in Texas today, killing four and injuring 14 others in another deadly attack.

The incident took place at 4 p.m. local time, less than fire years after the 2009 shooting at the same base which left 13 dead.

The Bell County Sheriff's Office confirmed the shooting in a statement released shortly after the attack. "There has been a shooting at Fort Hood and injuries are reported. Emergency crews are on the scene. No further details are known at this time."

All the victims of the attack are said to be soldiers and the shooter, who was also a soldier in uniform, reportedly shot himself dead.

Another updated post from the Fort Hood Press Center at 6.30 p.m. states: "Fort Hood's Directorate of Emergency Services has an initial report that a shooter is dead but this is unconfirmed. The injured personnel are being transported to Carl R. Darnall Medical Center and other local hospitals. Numerous law enforcement agencies are in support and on the scene. The number of injured are not confirmed at this time. No further details are known at this time. "

The shooter has been identified by CBS News as 34-year-old soldier Ivan Lopez. Click here for the alleged photo of Lopez.

The situation at Fort Hood is still considered an active scene.

President Barack Obama has been briefed on the shooting and is expected to make a statement Wednesday evening.

Mayor Dan Corbin told CNN: "It is unclear what is going on right now. We have been in touch with appropriate personnel, we are standing by with our police and ambulances, if needed. We are very concerned. Fort Hood is always there for us and we want to be there for them."