The fate of Boniface Mwangi, a human rights activist, remains unknown days after he was arrested in Tanzania, as pressure mounts on Tanzanian authorities to disclose his whereabouts.

Mwangi and Ugandan journalist and activist Agatha Atuhaire were seized from their hotel room at the Serena Hotel in Dar es Salaam on Monday, in what human rights defenders are calling a flagrant violation of regional human rights protocols.

On Wednesday, Mwangi's wife, Njeri Mwangi, broke down as fellow activists marched to the Tanzanian High Commission in Nairobi, demanding answers. "We don't know where Boniface is.

Whatever the issue is between the two governments, my husband has nothing to do with it.