A group of Twin Cities janitors and security officers voted Saturday to authorize a strike.
Their union, SEIU, represents more than 6,000 employees in the metro area. They work at companies that include Target, Wells Fargo and US Bank.
The workers object to proposed cuts to full-time positions, wages and health care.
Their contract ended Dec. 31.
Janitorial workers with SEIU also voted to strike in 2009 but reached a contract settlement before work stopped. In 2008, about 1,000 security officers walked out in a one-day strike in Minneapolis and St. Paul.