Rumored or unconfirmed sources have provided details India may be working on the extended range Brahmos ,also known in the circles as BrahMos EX .
India first tested BrahMos  way back in 2001, earlier it was known as PJ-10 and from the start of the joint venture it has been documented that India wanted to work on a Medium range supersonic cruise missile  with range of 500 to 600 km ,which  can be launched from submarines, ships, aircraft or land.
But due to  MTCR restrictions Russia was forced to work on a limited range 290km missiles , but many in ” circles ” believed that  range could be extended once the perfect ” Technological know off ” is acquired of the missiles .
India on its own was able to field Brahmos Block-II with little Russian assistance and also is working on Hypersonic version of it which will enable to travel at twice the current speed .