Washington (CNN) - President Barack Obama said Friday that flags at the White House and other federal buildings will be flown at half staff until Veterans Day in recognition of the shooting at Fort Hood, Texas.
"This is a modest tribute to those who lost their lives even as many were preparing to risk their lives for their country," he said at the White House.
"It's also a recognition of the men and women who put their lives on the line every day to protect our safety and uphold our values."
Full coverage: Fort Hood shootings
Obama said he met Friday morning with FBI Director Robert Mueller and other federal agency heads to discuss the ongoing investigation into the massacre.
"We don't know all of the answers yet, and I would caution against jumping to conclusions until we have all of the facts," he said.
The alleged shooter, Maj. Nidal Malik Hasan, a psychiatrist who worked in a hospital at Fort Hood, is blamed for the deaths of 12 soldiers and one civilian, military officials said.
Another 30 people were wounded; 28 of them required hospitalization.
Related: Search for clues in Fort Hood massacre
I am shocked and surprised at what I am reading here! Americans are guaranteed "Freedom of Religion" by the constitution from which all of our freedoms flow. Yet I see a sentiment that is so anti Muslim that I am ashamed.
The guy who shot all of those people at Fort Hood yesterday was an American. He was born in Virginia and was a Major in the US Army. It was a single act of a sick man, a man who apparently had been tormented because he was a Muslim. I've seen the clip of him going into a 7 Eleven to get coffee yesterday morning in the dress of his religion. What if someone pushed him over the edge with insults and he snapped?
This has nothing to do with Obama nor the Muslim religion. It has to do with stupidity, hate, ignorance and intolerance and you people are the best examples that I can find!
I am so tired of reading blogs that are filled with such hatred for all of God's chidlren! Regardless of your skin color, nationality, religious beliefs, WE are our brothers/sisters keepers, whether you agree or not. How can we expect peace to rule among all nations if WE cannot accept our brothers and sisters! President Obama was appointed for this Season and all of the naysayers take your complaints to God, because He is the One and only One that has Supreme Rule over all nations!