Seeking to end a siege that has left scores dead and shaken the nation, the Kenyan government said Sunday night that it was pressing an assault against al-Shabab militant attackers who had been holed up in a Nairobi shopping mall for more than a day. Late Sunday, the Kenyan military announced that it had retaken "most" of the Westgate mall - the attackers had been confined to the third floor since their initial assault on Saturday - and freed more hostages, though details could not be confirmed. Helicopters circled the mall building through the night, and occasional explosions and bursts of gunfire were heard above a rainstorm in the area. (Video Courtesy: CCTV Africa, Al Jazeera, KTN)