MONTREAL Businesses and political leaders in resource-rich provinces are calling with increasingly loud voices for an end to the CN Rail strike , but Trudeaus Liberals seems reluctant to intervene in contract negotiations.

Industry groups say the strike which entered its fourth day on Friday has particularly impacted farmers, the forestry industry and oil and gas, all of which rely heavily on rail shipments.

Striking workers are demanding an end to what they call dangerous work conditions and fatigue due to long shifts. They are also opposing a move by CN Rail to reduce prescription drug benefits.