Two CRPF personnel were injured in a grenade attack on their picket by militants in Karan Nagar area of the city this evening,police said. Unidentified militants lobbed a grenade on a CRPF picket outside the OPD block of SMHS hospital at around 7.10 PM,they said,adding two jawans suffered minor injuries in the blast which created panic among the passersby. No militant outfit has claimed responsibility for the grenade attack so far.