Shortly after noon, news started trickling through the social network that something had gone horribly wrong at Westgate Mall, one of Nairobi's most popular locations for foreigners and middle-class Kenyans.
Baada ya saa za mchana kupita, habari zilianza kuenea kupitia mitandao ya kijamii kwamba hali ilikuwa mbaya sana kwenye kituo cha kibiashara cha Westgate, eneo moja wapo maarufu kwa wageni na wa-Kenya wa tabaka la kati.