Mumbai Police, which is probing the 5,600 crore rupees payout involving the National Spot Exchange Ltd, has attached 100 of the 166 properties of the defaulters it has identified so far besides seven flats of the exchange's former top officials who were arrested in the case.Additional Police Commissioner (Economic Offences Wing) Rajvardhan Sinha said on Wednesday that so far 166 properties including residences, offices, industrial units and lands of the defaulters or borrowers have been identified of which 100 have been attached. The value estimation of the attached properties had not been done yet, he added.The investigators have found Rs 145.57 crore in various bank accounts that were frozen during the probe. Meanwhile, directors of defaulting companies Loyal and Mohan India were questioned by police.