watching this unfold can appreciate why. this is an extraordinarily painstaking operation. the gunmen have made it very clear from the very beginning that much like the mumbai attack they have no intention of being taken alive. we understand they are hiding behind the hostages, using them as human shield. so you can imagine trying to go into that situation to both disarm the gunmen and trying to rescue the remaining hostages, it is extraordinarily difficult and taking a long time. >> reporter: there are still 60 people unaccounted for. is there any kind of an update about that? because we have word about that a short time ago. >> reporter: well, the last few eyewitnesss that have been able to come out from within the hostage-taker's room, they're describing some pretty horrific