At least 15 people have been killed and around fifty injured after an under-construction flyover collapsed in North Kolkata near Ganesh Talkies (Girish Park), Thursday afternoon. Several are still trapped under the debris. The location of the bridge is in a densely populated locality in BarraBazar. West Bengal Chief Minister Mamata Banerjee arrived at the flyover collapse site after cancelling a political rally for the upcoming state Assembly polls.Rescue operations are currently under-way and eye-witnesses at the site feared at least a 100 people could be trapped under debris. The Indian Army and teams of the NDRF have been pressed into service