Indian naval forces tested Souriya (Sagarika) SLBM from the INS Arihant. Earlier they tested same missile on the land based test facilities. It seems that the test was successful. The missile has the range of 700 km.
INS Arihant was build with Russian technical assistance, though, this nuke sub shouldn't be used in operational deployments because of its PWR nuclear reactors' design errors which could create disastrous situation. But DRDO hopes to use this boat as an R&D platform for future nuke submarines. Design errors are expected to be solved in the next submarines of this class.