(CNN) -- Nearly 100 soldiers are confined to a Washington state base following a report of missing sensitive military equipment, including scopes and night lasers, a spokesman said Sunday.
Soldiers in the 4th Brigade, 2nd Infantry Division unit can have day visits but must sleep at the base at night, said Maj. Chris Ophardt, a spokesman at Joint Base Lewis-McChord.
Authorities conducted an inventory last month and are trying to determine how long the equipment has been missing, he said.
The unit has been home from Iraq since September 2010.
Authorities have offered a $10,000 reward. No more information was immediately available.