Right now, at the time of the publication of this blog post, Fort Hood is on lockdown with shelter-in-place instructions. At least one is dead, and there are multiple injuries.
The Huffington Post has some good coverage.
Also see WTOP.
As of this reporting, the official position is that there is no connection with this recent story: "U.S. Army Recruit Accused of Plotting Jihad."
The situation in progress right now has been officially deemed a "soldier on soldier" incident. Major Nidal Hassan's jihad attack on Fort Hood in 2009 was also a "soldier on soldier" incident and was repeatedly called "workplace violence" by the Department of Defense.
Let us remember that this attack today is second attack on a military facility here in the United States in 8 days. On Monday, March 26, there was a killing on Norfolk Naval Base.