A proclamation honoring the victims of the massacre at Fort Hood, Texas, was signed Friday by President Barack Obama.

"Our nation's thoughts and prayers are with the service members, civilians, and families affected by the tragic events at Fort Hood, Texas," the proclamation read. "The brave victims, who risked their lives to protect their fellow countrymen, serve as a constant source of strength and inspiration to all Americans. We ask God to watch over the fallen, the wounded, and all those who are suffering at this difficult hour."

Thirteen people died and 30 people were wounded Thursday when alleged gunman Maj. Nidal Malik Hasan, 39, an Army psychiatrist at Darnall Army Medical Center, opened fire at the base's military processing center Thursday.

The proclamation also noted Obama ordered flags be flown at half-staff at the White House, federal buildings, diplomatic venues, military installations, naval vessels and stations in the United States and abroad until Veterans Day.

Obama also plans to attend a memorial service at Fort Hood once the service is scheduled, Press Secretary Robert Gibbs said during a news briefing.