The incident took place late last night at Khoja Society in Gulubhai-ni-Wadi locality when the groups clashed with each other using revolver, swords and also pelted stones, they said.
Pyar Ali Medhvani (52) and his two sons--Hussain Medhvani (25) and Abbas Ali Medhvani (24)-- were killed when they were hit by bullets fired from a revolver allegedly by one Ghulam Bhurani, police said.
"The clash erupted between two groups of the same community late last night over old rivalry. Groups wielding revolver, swords and stones clashed with each other that left three persons of the same family dead, and eleven others injured who are being treated at various hospitals," a police official at Talaja police station said.
An old rivalry between the two groups was on the issue of niyaz, exchange of religious offerings, police said.
The case is being investigated even as the persons named in the FIR are yet to be arrested, the police official said.
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