The four were nabbed from Ghospuri village, about 18km from here. Two of them were identified as Kailas Bhosale (30) and Bitya Bhosale (25), Assistant Police Inspector Devidas Pawar said.
The names of two others were not disclosed. All were later handed over to Pune Police, he added.
On March 24, a gang of robbers had attacked two watchmen at the Diveagar Ganesh temple, killing one of them. The robbers had stolen an ancient 1.5 kg golden Ganesh idol, estimated to be worth Rs 50 lakh.