Indore: In a bizarre incident, a thief unlocked the doors of a house with the key which she left hanging on a nail, outside to unlock the door to do household chores, in Scheme No. 74—and fled away after stealing the gold jewellery kept in the safe. Police have registered a case on the complaint of Kiran Jaiswal, the owner. The maid, Gayatri Pawar of Raghunandan Bag, used to hang the key again on the nail and leave. To her shock, three mangalsutras, three rings and earrings were nowhere to be found on Sunday when Jaiswal reported the incident. The lock was not broken as the thief is suspected to have used the owner’s key to enter the house. A case has been registered by the police.