That is absolutely the PS3 stage of an Indian Polar Satellite Launch Vehicle. It is a very unique upper stage in that that 'tank' is actually a Kevlar wrap over a solid Hydroxyl-terminated polybutadiene (HTPB) propellant. The part that is broken on the bottom is where the nozzle sat; they use a 'submerged' nozzle where much of the nozzle core is actually up inside that.

So, it is not a vessel for a liquid propellant like many people would think.

This page has a few photos and a cool cross section of the type of construction, user 'PS-3':

http://www.b14643.de/Spacerockets_1/India/PSLV/Gallery/PSLV....