Official sources in the security establishment said an intelligence input has been received this week which advised headquarters of central police organisations like CRPF, BSF and ITBP, snoop agencies like the Intelligence Bureau (IB) and RAW and those belonging to Delhi Police to beef up security deployment and review the security of senior officials during their movement in and around Delhi.
The security teams guarding such installations have been asked to step up "perimeter vigil and night patrolling" and ensure fool proof visitors entry drills and counter-sabotage checks to tackle any attempt that could be used to launch a hit against them.
"All police and related establishments in the NCR region have been alerted in view of recent threat inputs. The personal security of senior officials of these organisations have also been asked to take precautionary measures," they said.
The inputs are seen as a stepped up vigil in the wake of the upcoming Independence Day celebrations on August 15, they said.