Tanzania opposition officials arrested as Tundu Lissu refuses to appear in court

Chadema spokesperson says party's vice-chair John Heche and secretary general John Mnyika held on way to protest over treason charges

Tanzania's main opposition party said on Thursday at least two of its officials had been arrested on their way to a rally to support the leading government opponent Tundu Lissu, who refused to appear at a virtual court hearing to face a charge of treason.

Authorities in the east African country have increasingly cracked down on the opposition Chadema party ahead of presidential and parliamentary polls in October.