KOCHI: Burglars broke into a house at Kalamassery here on Wednesday and decamped with gold jewellery weighing 20 sovereigns after setting ablaze a portion of the building. The house owner V S Devan and family had gone to a temple after locking the house. The incident came to light when they returned in the afternoon. “The culprits set the house on fire to destroy evidence. Jewellery belonging to the house owner’s wife and son were missing,” said a police officer.