Sleuths of Anti-Corruption Bureau (ACB) on Thursday raided the house of former Director of Nizam Institute of Medical Sciences (NIMS) Dharmarakshak and searched the house. It seized several documents pertaining to the purchase of medical equipment. Dharmarakshak had served as Director NIMS during 2013-14. ACB had received complaints that gross violations were made in tender and purchasing of operation theatre tables, lights and ventilators. He is involved in swindling to a tune of Rs 3.03 crore.