The CBI on Thursday conducted searches at six places, including the Delhi Secretariat, following alleged irregularities in spending Rs 10 crore on security of Delhi hospitals by former Health Secretary Tarun Seem, considered close to Chief Minister Arvind Kejriwal.Sources said a CBI team searched Seem's office and his residence for documents pertaining to the contract for hiring three security agencies."The raid was conducted following an allegation of Rs 10 crore misappropriation of Delhi government funds," an official said.The probe agency has registered a case against Seem, also close to Delhi Health Minister Satyendra Jain and three security firms, the official said.Seem, an IRS officer, was earlier appointed health secretary by the AAP government. But the decision was overturned by then Lt. Gov. Najeeb Jung because only an IAS officer can seve as a secretary to the government.Seem was later appointed director of health services in Delhi by the Kejriwal government."Irregularities were committed in the engagement of three private agencies for security in the emergency areas of Delhi government hospitals," the official said.