Military, friends and families have observed a moment of silence at Fort Hood, Texas and other U.S. military bases as a show of respect for the victims of the shooting rampage.

Secretary of Defense Robert Gates had declared a moment of silence for U.S. military forces worldwide on Friday afternoon.

Dozens of people haved gathered at Fort Hood and bowed their heads as part of the moment of silence.

Army Chief of Staff George Casey and Army Secretary John McHugh also arrived at the base Friday.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

WASHINGTON (AP) _ Secretary of Defense Robert Gates has declared a moment of silence for U.S. military forces worldwide as a show of respect for the Fort Hood victims.

The moment of silence is planned for 2:34 p.m. EST Friday _ exactly 24 hours after the shooting in Texas. All U.S. forces worldwide are being asked to participate in the show of respect.

A spokesman says Gates has no immediate plans to travel to Fort Hood.

Army Chief of Staff George Casey and Army Secretary John McHugh arrived at the base Friday.