THIRUVANANTHAPURAM: In an apparent bid to secure central clearance for SilverLine, the state is exploring the possibility of extending the semi high-speed rail project up to Mangaluru in Karnataka, so as to make it an inter-state project. The state has taken up the matter with Karnataka and the latter made it clear that it would examine the same after going through the detailed project report (DPR) and the route alignment. It’s learnt that Chief Minister Pinarayi Vijayan is likely to hold a discussion in this regard with his Karnataka counterpart Basavaraj Bommai in Bengaluru by the end of this month.