Two brothers were stabbed for allegedly asking a group of men to stop troubling their sister in South Delhi's Sangam Vihar on Friday evening, the police said on Saturday.
Police have arrested one of the accused in connection with the case.
The victims have been identified as Nitesh, a first-year student at the Delhi University, and Mahesh, staffer at a private hospital who were stabbed by Anoop Rathore, an auto-rickshaw driver, the police said.
"The victims had gone to a nearby market where the accused was already present with his friends. The victims asked Rathore not to trouble their sister and to stay away from her, after which, a scuffle broke out between the two groups," a senior police officer said.
During the scuffle, the accused and his friends stabbed the duo and fled from the spot.
"A PCR call was made by the locals and the two injured were rushed to a nearby hospital. They are undergoing treatment. A case under relevant sections of the IPC was lodged against the accused," a senior police officer.
(With Inputs from Agencies)