FINDLAY, Ohio (AP): Workers in northwest Ohio continue to protest as the first nationwide oil refinery strike since 1980 moves into its fourth week.
 
The Blade newspaper in Toledo reports about 200 people demonstrated Tuesday outside the Marathon Petroleum Corp. headquarters in Findlay despite temperatures in the teens.
 
More than 60 workers from the BP-Husky refinery in Oregon near Toledo joined the demonstration, and two busloads of workers from Marathon's refinery in Catlettsburg, Kentucky also made the trek.
 
The strike began after the United Steelworkers union said that negotiations with Shell Oil Co. had broken down. Shell is negotiating the national contract for other oil companies.
 
The strike began Feb. 1 at refineries mostly in Texas and California, then later grew to include Ohio and Indiana refineries.