Farmers will observe a day-long relay hunger strike on Monday at all sites of protest against the Centre's new agri laws and halt toll collection on highways in Haryana from December 25 to 27. Thousands of farmers, mainly from Punjab and Haryana, are protesting against the laws for the last over four weeks at various border points of Delhi and demanding that the legislations be repealed. "Farmers will begin a day-long relay hunger strike on Monday at all sites of protest against the new agri laws. It will be started by a team of 11 members at protests sites here," Swaraj India Chief Yogendra Yadav said at a press conference at the Singhu border.