The clash ensued after the YCL cadres allegedly dismantled the stage set for the UML´s Rukum district convention scheduled to be inaugurated by party chairman Jhala Nath Khanal.
All the five injured in the clash belong to the YCL. The condition of one Laxman BK, who received deep injury to the head, is said to be critical.
Maoists have alleged that YF cadres attacked YCL men with wood splinters and iron rods.
Clash at Kanchanpur jail leaves five inmates injured