A 34-year-old man was arrested on Friday at 11.30pm in connection with the double murders at Kovan, police said in a statement on Saturday morning.
More details are expected at a police press conference due later on Saturday.
Mr Tan Boon Sin, 67, was discovered in his home in Hillside Drive, near Upper Serangoon Road while the body of his son, 42, was found earlier about 1km away outside Kovan MRT station.
According to eyewitnesses a Toyota Camry had dragged the body of the younger Mr Tan along Upper Serangoon Road before the body was dislodged.
Co-operation from the Malaysian police department helped in the successful arrest of the suspect the statement read.
Here is the press release in full:
A 34-year-old man has been arrested on 12 July 2013 at 11.30pm in connection with the double murders at Kovan on 10 July 2013.
The arrest of the suspect was possible through the close collaboration between the Singapore Police Force (SPF) and the Royal Malaysian Police (RMP). The SPF would like to thank the RMP for their unwavering support and assistance in this case.