The three accused, identified as Rashid (26), Mohammad Akram (21) and Sahib (19) have been arrested.
According to the police, the incident took place at around 11 PM last night when trio, who are vegetable vendors, reached Yusuf's stall to have dinner.
"As they took extra bread, the bill amount was more than what it usually would have been. An argument broke out between them over payment of Rs 250. When Yusuf's younger brother Nawab tried to intervene, they abused him as well and a scuffle ensued during which the trio stabbed them with a knife and a rod used in the kebab grill," a police official said.
Following a PCR call, police reached the spot and on the basis of information provided by the locals and eyewitnesses, the accused were nabbed from their residences early this morning.