About 1,500 janitors and food prep and other service workers at the University of Minnesota are taking a strike vote this week.
The employees, many of whom are Black, East African or immigrants, are requesting wages of $20 an hour and say they cannot adequately feed or house themselves or their families on their current pay.
Tensions over the pay, short staffing and alleged discrimination have been brewing since June 30, when the workers' last labor contract expired.
On Monday, their union, Teamsters Local 320, sued the U and its Board of Regents in Hennepin County District Court for allegedly violating the Public Employment Labor Relations Act.
The lawsuit accused school officials of monitoring employees while they picketed, taking down names and using other means to intimidate and coerce them, the lawsuit said.
Employees and university officials have been in mediation talks for weeks. More meetings are scheduled for Oct. 6 and Oct. 7. One month ago, employees picketed in front of Centennial Hall in Minneapolis as students moved into their dorms.
"The university is certainly committed to reaching a settlement agreement as part of mediation," university spokesman Jake Ricker said.
In a statement, he added: "We continue to look for opportunities to collaborate with our union partners and resume mediation in order to reach a solution for Teamsters members before a strike occurs. In the meantime, we are making contingency plans to ensure continuity of operations."