200 people were killed in the Mpeketoni attack  
Occurred in Mpeketoni, Kenya on August 15, 2014
Reported by john2014 via Walk-in / in person on August 12, 2014 in Dide waride, Kenya

This rumour is confirmed false and is of low priority – here's why:
No note of this number of people killed in the attacks.

This heatmap depicts the spread of rumours over time. Hotter areas of the map denote earlier sightings, while cooler areas indicate delayed dispersion.

Location Reported by Via Date
Dide waride, Kenya john2014 Walk-in / in person 12-Aug-2014
August 21, 2014 | 7:32 AM | Christine
Standard newspaper puts the death toll at 48:http://www.standardmedia.co.ke/theco, Aljazeera and BBC put it at 60.
The numbers vary however there is no note of the death of 200 people in the media as a result of the attack.

August 21, 2014 | 6:10 AM | Christine
To verify with news sources.