A White House aide says President Barack Obama plans to attend a memorial service Wednesday at Fort Hood -- the site of last week's shooting rampage.
A Fort Hood spokesman confirms there will be a remembrance ceremony that day, and presidential adviser Dan Pfeiffer told CBS' "Face the Nation" that Obama will be there.
Investigators said that Army truck driver Ivan Lopez had an argument before opening fire at the Texas post last Wednesday, killing three soldiers and wounding 16 others before taking his own life.
Fort Hood's commander, Lt. Gen. Mark Milley, hasn't discussed the cause of the argument with any great detail.
The attack was the second at the base since 2009, when 13 people were killed in a shooting by an Army psychiatrist.
The memorial service will be held at 2 p.m.