Top separatist leaders in India, including Hurriyat chairman Mirwaiz Umer Farooq and hardliners like Syed Ali Shah Geelani, have come under the security agencies’ scanner for their links with Ghulam Nabi Fai, an American citizen and director of the Washington-based Kashmiri American Council (KAC), arrested by the FBI on Tuesday on charges of being an agent of Pakistan’s Inter-Services Intelligence.