A group of about 50 family members and friends followed behind the two hearses carrying the bodies of the Kovan murder victims - Mr Tan Boon Sin, 66, and Mr Tan Chee Heong, 42, on Tuesday.
The wife of the younger Mr Tan, who had been calm throughout the rites earlier on Tuesday afternoon, suddenly cried in anguish as she pushed the hearse carrying her father-in-law.
The elder Mr Tan's wife had left earlier in another car with relatives and did not follow the hearses. She was seen sobbing.
The hearses made their rounds to Kaki Bukit where the workplaces of the two victims are before heading to Mandai Crematorium.
The two men were murdered last week and their bodies found about 1km apart in the Kovan neighbourhood. The suspect, Iskandar Rahmat, 34, was charged in court on Monday.