US Army authorities have ordered about 100 troops on lockdown after night vision goggles and other high-tech equipment were stolen from a base in Washington state, officers said Monday.

The lockdown restricts the soldiers to their barracks, showers and work place and bars them from venturing off of Joint Base Lewis-McChord until US Army criminal investigators complete their work, a spokesman said.

"The unit went on lockdown on Wednesday," Lieutenant Colonel Gary Dangerfield, spokesman for the army's I Corps, told AFP.

"There's no change as of right now. They're still conducting the investigation."

About 100 items are missing, including scopes for rifles, night vision goggles and other "accessories for weapons," Dangerfield said. No ammunition or weapons were missing, he added.

The army's criminal investigative division has offered a $10,000 reward for information that could help with the return of the missing gear.

The soldiers affected were from the 4th Stryker Brigade.