Teams of the probe agency carried out searches in Pollepalli SEZ in Mahabubnagar district and sites in Khammam district as part of investigations into the case related to investments in business entities of Jagan.
Simultaneously searches were on at seven locations in Hyderabad in relation to the Emaar land deal, CBI officials said here.
Among the premises where searches were conducted include Penna Cements, Aurobindo Pharma, Navbharat Ventures and Hetero Drugs, they said.
"The searches are continuing... we have collected documents as part of investigations," CBI Joint Director V V Laxmi Narayana told the media.
The agency had yesterday started searches at various premises of Jagan and firms which invested in his businesses following charges that investments made in his companies were "quid pro quo" for favours doled out by his father Y S Rajasekhara Reddy, when he was the chief minister.
The searches were yesterday conducted at Hyderabad, Bangalore, Chennai, Kolkata, Rajkot, Delhi and Mumbai.
CBI on August 17 registered a case against Jagan, the Lok Sabha MP from Kadapa, on the instructions of Andhra Pradesh High Court under IPC sections pertaining to cheating, criminal conspiracy, criminal breach of trust and also Prevention of Corruption Act.