Dayanidhi Maran. Pic/AFP

A special CBI court here on Wednesday discharged former telecom minister Dayanidhi Maran, his brother Kalanithi and other accused in the "illegal" telephone exchange case. Special judge S Natarajan allowed the petitions filed by the Maran brothers and others seeking their discharge, holding that there was no prima facie case against them. The judge had on March 9 reserved orders for Wednesday in the case.