Burglars decamped with jewellery and cash worth Rs 3 lakh from a house in Sector 15 late on Tuesday night. The owner of the house was out of town when burglars struck and it was the neighbours who informed the police. The police said unidentified men broke the lock of the main door of house number 1362. The house owner,Premlata,used to stay alone and had gone to Kalka on Monday to meet her daughter, a police officer said. Sector 16 Station House Officer,Inspector Aman Kumar,said a case of theft has been registered and the investigations are on.