In the farming town of Karoi, in the north of the country, they have been joined by white-owned shops and industries, causing major disruption.
BBC: Zimbabwean farm
2.
Sex workers in Karoi who were marched to attend night vigils from Saturday said Mr Tsvangirai's withdrawal was ''going to save them from obvious rape by Zanu-PF youths''.
BBC: Reporters gauge Zimbabwe mood
3.
Later, an observer team from the Southern African Development Community (Sadc) was held for some 45 minutes by Zanu-PF supporters at a farm about 20km (13 miles) outside Karoi.