Kolkata has five long-distance railway stations, located at Howrah (the largest railway complex in India), Sealdah, Chitpur, Shalimar and Santragachi, which connect Kolkata by rail to most cities in West Bengal and to other major cities in India.[168] The city serves as the headquarters of three railway Zone out of Eighteen of the Indian Railways regional divisions—the Kolkata Metro Railways, Eastern Railway and the South-Eastern Railway.[169] Kolkata has rail and road connectivity with Dhaka, the capital of Bangladesh.[170][171][172]