MINNEAPOLIS (WCCO) — Nurses at several Twin Cities hospitals voted to reject a contract offer from Allina Health and authorize a strike Monday night.

“Nurses know what’s at stake. Nurses are prepared,” Angela Becchetti, registered nurse at Abbott Norhtwestern, said in a press release. “We have to be advocates for our practice, our patients, and for ourselves and our family.”

READ MORE: Man, 75, Killed In Otter Tail County Crash

The Minnesota Nurses Association said nurses from Abbott Northwestern, Phillips Eye Institute, Mercy, United and Unity hospitals voted by overwhelming majority to reject Allina’s contract offer. They also voted by more than a 66 percent super majority to authorize the negotiating committee to call a strike.

READ MORE: 47-Year-Old Woman Shot In Head In St. Paul

The nurses’ union said Allina’s proposal shifted too much of the healthcare costs onto the nurses.

The contract for 5,000 nurses expired on May 31. Allina Health gave the nurses what they called a “complete offer” last week and told nurses they would not continue to negotiate, according to MNA.

MORE NEWS: MN Weather: Over 6 Inches Of Snow Possible In Northern MN This Weekend