The I&B Ministry has written to the Ministry of Home Affairs (MHA) seeking reasons behind the denial of security clearance to 33 channels of Kalanithi Maran-promoted Sun TV Network, so that it can take further action. "We have asked for the reasons behind this decision," a senior I&B Ministry official said, adding that the principle of natural justice demands that the concerned party is also given a hearing if any action has to be taken.