The alleged theft happened between November 2018 and August 2019, court documents state.
The temporary location will service south Minneapolis until the two that were destroyed can be replaced.
At least 20 sorting machines could be decommissioned soon, a lawsuit claims.
"To avoid even the appearance of any impact on election mail," the postmaster general says any further operational changes will be postponed
Minnesota Secretary of State Steve Simon: 'Don't wait until October' to request ballot
USPIS is seeking information on two men believed to be involved with one of the fires.