Updated

Greek Prime Minister Alexis Tsipras has agreed to meet with representatives of protesting farmers who have staged blockades at the country's highways for the past month.

The farmers are protesting pension reforms planned by Tsipras' leftwing government as part of commitments to international bailout lenders, and are to meet the prime minister later Monday. The blockades have triggered a spat with neighboring European Union member Bulgaria, which is seeking EU intervention to end long delays for truckers.

Only one of the four major protesting farmers' groups agreed to attend Monday's talks.

Tsipras is struggling to push through the cost-cutting reforms after opposition parties said they would not back the pension system overhaul, leaving him reliant on pro-government lawmakers who have a majority of just three seats in the 300-member parliament.