Pakistan is expected to respond to the dossier handed over by India on the 26/11 terror attacks soon. But ahead of that, more insight has emerged into what really happened in the early hours of the Mumbai attack. NDTV has got details of the first night on the two terrorists who attacked the Oberoi. NDTV has learnt that after at least one killing spree, the terrorists locked themselves in a room on the 18th floor of the hotel.