sas nagar three persons were injured one of them seriously when several persons entered an auto parts shop in balongi village and attacked the owners of the shop on friday the owner of the shop baba auto electricalavtar singh 31 a resident of kharar sustained serious injuries near the eye and nose he said group of eight persons had entered his shop at around 630 pm and attacked him with kirpans and lathis avtar singh who is presently undergoing treatment at the pgi said one kaka singh of baryali village came to his shop at 230 pm and entered into an argument with him over repair of his tractor battery avtar singh alleged that kaka singh who was drunk repeatedly called avtar singhamrik he also entered into an argument with avtar saying he was a kacha mechanic he later went away after one hour at 330 pm three other men entered the shop and inquired about the conversation between avtar and kaka singh and left avtar singh alleged that in the evening eight people entered his shop and started beating him and his partner harvinder singh and one mechanic tarlochan singh while avtar singh fell unconscious after being hit by a kirpan harvinder singh and tarlochan singh escaped with minor injuries the police are investigating no arrests have been made so far