Satish Mann, who works as sanitary inspector with Defence Ministry, was at a relative's house along with his family yesterday evening when the burglars struck his house.
The incident came to light when Satish returned home.
Among the items missing were four fold sets, gold biscuits weighing 100 grams, other jewellery items, some documents and Rs 1.28 lakh in cash, a police officer said.
Police suspect the role of an insider and have questioned some of the relatives, and further investigation is on, the officer said.