The Intelligence Bureau has issued a specific alert of a possible "human bomb" targeting a rally of BJP prime ministerial nominee Narendra Modi.br br According to sources, the IB alert says the attack may be on the lines of assassination of former prime minister Rajiv Gandhi by the LTTE in 1991. The "highly specific" input states that while Modi won't be shot at, a suicide bomber may target him disguised as a supporter. The alert does not specify the gender of the likely bomber.