India, Nov. 13 -- In the 10 hours before a Hyundai i20 exploded in a deadly blast near Delhi's Red Fort on Monday evening, the suspected bomber - Dr Umar Un-Nabi - was seen stepping out of the car at least twice without his mask, first in Connaught Place and later near Turkman Gate, said investigators familiar with the findings of the probe.

Both stops were confirmed through CCTV footage recovered by Delhi Police's Special Cell, which is assisting the National Investigation Agency (NIA) in tracing Umar's movements through the city before the explosion. According to officers, Umar entered Delhi from the Badarpur border around 8am and drove across southern, central, eastern and northern Delhi before the car blew up at 6.52pm near Red Fort....