The launch of All India Radio's new channel "Akashvani Maitree", which was scheduled in Kolkata on Tuesday, has been postponed due to "unforeseen reasons," Prasar Bharati officials said today.<br/><br/> <br/><br/>The channel aims at providing a common platform for participatory content creation for listeners in India and Bangladesh. New dates for the launch would be announced later, the officials said. The Bengali language service channel was to be launched by President Pranab Mukherjee at a function in Kolkata on June 28.