Several opposition figures in Tanzania were arrested on Monday.
They were rounded-up for planning “illegal demonstrations” after accusing the ruling party of rigging the general election.
Main opposition parties on Saturday called out citizens to challenge the October 28 parliamentary and presidential election results.
Special police zone commander, Lazaro Mambosasa, confirmed the arrests of 20 politicians.
Mambosasa, in a chat with reporters, listed Chadema Party National Chairman, Freeman Mbowe among those in custody.