Nurses from numerous Twin Cities and Duluth hospitals reached a tentative agreement Tuesday morning to avoid the three week strike they announced Thursday.

An agreement was reached with St. Luke’s nurses in Duluth Monday evening. Deals, including an 18% wage increase over three years, were announced Tuesday morning in the Twin Cities by spokespeople for Children’s Minnesota, Allina Health, North Memorial Health, Methodist Hospital and M Health Fairview’s Southdale Hospital and University of Minnesota Medical Center according to reporting from the StarTribune.

Last week the nurses announced a three-week strike that would begin Dec. 11 if they could not come to an agreement on pay, workplace violence prevention and staffing levels. Around 15,000 nurses would have striked. The frustration among nurses was due to issues with understaffing and an overwhelming number of patients during this year’s flu season, the StarTribune reports.

Twin Cities nurses held a three-day strike in September after disagreements over staffing levels, pay and whether nurses should have more say in staffing.

Nurses now must vote on the deal reached by their union and hospital negotiators. If they vote to approve it, they will cancel their strike from Dec.11-31.