KARACHI - Panic gripped the city after a hoax call claimed that a bomb was planted in a commercial building situated in busy neighbourhood of the metropolis on Saturday. According to details, an unknown person made a phone call to the call centre of the cellular company located in the commercial building near Nursery within the limits of Ferozabad Police Station. A heavy contingent of law enforcers including the bomb disposal squad over the call immediately reached the site and vacated the whole building to avoid any untoward incident.