The CBI has arrested two more people, including Shahid Balwa's brother Asif Balwa and DB Realty official Rajiv Aggarwal, for their alleged involvement in the 2G scam. The CBI is trying to tie up the money trail in the 2G scam and Rs 214 cr rupee loan to DMK's Kalainger TV from a subsidairy of DB Realty is under the scanner.