Police arrested 11 out of 15 people who were allegedly involved in the killing of three hindus in Shikarpur near Sukkur on Wednesday, Express 24/7 reported.
Police are searching for the remaining four accused in the case.
The incident occurred earlier on Monday in Chak town and the dead were identified as Dr Ajit Kumar while the two businessmen were identified as Naresh Kumar and Ashok Kumar.
(Read: Eid murder: Hindu community threatens indefinite strike if culprits not arrested)
The relatives of the deceased had filed a case against Salim Bhayo, Naeem, Adbdullah, Abdul Latif, Abdul Ghani and other suspects.
The Hindu community in Shikarpur had been in conflict with the Muslim Bhayo community over an alleged case of sexual assault. The Muslim community alleged that three members of the Hindu community had sexually assaulted a girl from their community a few weeks ago and the Muslim community wanted to exact revenge.
Various nationalist parties in Sindh had demanded the arrest of the gunmen within 72 hours, while the city continued to mourn the killings for the second consecutive day.