My thoughts, the Snipers positioned themselves in such a way than any KDF soldiers who tried to get to the upper floors was taken out. 6 soldiers dead a number of policemen dead......they decided it was enough, pushed the media and public behind, started the smoke as a destruction and then BOOM.
..."Wewe ni mtu mdogo sana....na mwenye amekuandika pia ni mtu mdogo sana!".