Modi's security tightened after IB's warning

The Centre has tightened security around Narendra Modi following an intelligence alert about ISI using Pak-based Khalistani terrorists to target Modi. IB suspects that ISI has also sheltered IM's founder Riyaz Bhatkal who masterminded the Oct-27 Patna bomb blasts. Modi now has three layered protection--one group to tackle attackers, second to provide cover and third to get him to safety.