This need to be updated I saw reports yesterday of them in Johannesburg South Africa and today I've already seen a report they are on their way to Zurich Switzerland
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This is all updated based on what we know so far.
The itinerary from Prague, Czech Republic to Harare, Zimbabwe involved flights via Zurich and Johannesburg, so that's where those sightings are coming from.
There were no legs in South Africa or Switzerland though.